Monthly Price Changes of Three Metals in 2014

The response presents a relevant overview and covers all three metals with mostly accurate data. However, zinc starts near 1%, not 2%, and copper reaches about 1.5% in December rather than both November and December. Describing nickel as relatively stable from March to May is reasonable compared with its larger movements.

Information follows logical month-by-month sequences for each metal, but the introduction, overview, nickel details and copper details occupy one paragraph, with only zinc separated. Several flawed sentences, including 'In zinc followed a downward trend', also disrupt progression.

Vocabulary is generally adequate for describing change, with terms like 'sharp decline', 'fluctuations' and 'recovered', but it lacks range and includes imprecise or erroneous usage such as 'line chat', 'most highest' and 'make comparison and relevant'.

There is some use of complex structures and time sequencing, yet sentence errors are frequent, including missing verbs, faulty articles and agreement problems, which occasionally strain but mostly do not block meaning.

The response provides an overview and accurate July-September figures, but repeatedly confuses monthly percentage changes with price levels. Its zinc-nickel comparison has an unclear time range, and it omits October-December entirely, leaving the late-year movements unreported.

The response is organised into logical paragraphs with a clear progression from overview to detail, though cohesive devices are at times mechanical or imprecise, such as 'On the other hand' and the vague reference 'During this time', and the final grouping sentence is hard to follow.

There is a sufficient range of vocabulary for describing trends, including 'fluctuating', 'sharp decline' and 'stable fluctuation', but some word choices are awkward or imprecise, such as 'staggering negative 3%', 'least alterations in price was shown' and 'held on to a fixed price'.

A mix of simple and complex structures is used with generally clear meaning, but recurring errors appear, including subject-verb and tense problems ('the least alterations... was shown', 'which has more or less maintained'), the faulty passive 'was continued', and unclear pronoun reference in 'exceeded Nickel's and was continued'.

The response covers the three metals and their broad movements with an overview, but repeatedly describes monthly percentage changes as price levels. The one-sixth comparison is valid for nickel's rate, not its price, while the claims of doubling and tripling across negative values are unsupported.

The response is logically organised metal by metal with a concluding overview, and progression is generally clear, though referencing of months is sometimes vague ('in the middle of the year', 'during the month').

There is adequate vocabulary for describing trends (decreased slightly, remained stable, reached its lowest value), but recurring imprecision ('the highest amount of changes', 'about three times twice as high') and the repeated misspelling 'Cooper' limit flexibility.

A mix of simple and complex sentences conveys generally clear meaning. Control is uneven in the mismatched comparison 'the price of nickel was higher than the other two metals', the conflicting phrase 'three times twice as high', and the unnecessary capital after 'Overall,'.

The response covers all three metals and identifies nickel's greater volatility and copper's relative stability, with mostly accurate figures. However, it incorrectly includes July among the months unchanged from the preceding month and describes zinc's flat July-September segment as fluctuating.

Progression is logical with effective paragraphing and linking devices, though parts of the third and fourth paragraphs read as a sequential data recital rather than fully synthesised comparison.

Vocabulary is sufficiently flexible and precise for a data summary, with appropriate terms such as 'dropped sharply', 'plummeted', and 'remained stable', and no significant errors in word choice.

A wide range of structures is used with generally good control, including complex sentences and accurate tense use, with only occasional minor slips that do not impede meaning.

All three metals are covered, and nickel is correctly identified as most volatile and copper as most stable. Copper’s December increase of about 1.5% compared with November is supported. However, nickel’s January figure is compared with the previous year instead of month, the January-to-December difference is five percentage points, and the opening range comparison needs clarification.

Progression is generally clear from introduction to details to overview, but the long detail paragraph relies on repetitive sequencing. 'On the contrary' wrongly introduces a comparison rather than a contradiction, and the final overview joins two independent clauses with only a comma.

Vocabulary is sufficiently flexible for the task, with appropriate items like 'fluctuations', 'recovered', and 'varied in the range of', though some phrasing is imprecise or unnatural, such as 'closing range', 'took off from a level of 1', and 'finished the journey'.

The response uses a range of structures and generally conveys its meaning, but control is uneven: the nickel measurement phrase is malformed, 'beginning of year' lacks an article, 'at 2% gain' is awkwardly formed, and the final overview contains a comma splice.

The response covers the key trends across the year with a clear overview and largely accurate data, but the unsupported claim that zinc's 2% December rise was the highest point of the year conflicts with nickel's 6% January figure and the slightly imprecise description of zinc's mid-year values limit achievement.

The information is logically sequenced across three clear paragraphs with a logical half-year division, and a range of cohesive devices is used naturally without overuse.

The vocabulary is sufficiently flexible for the task, using terms like 'fluctuations', 'dramatic', 'decline', and 'surge' appropriately, with only minor imprecision such as 'minerals' instead of metals and some reliance on trend verbs.

A variety of complex and simple structures is used with good control, including comparative clauses and time references, and errors are rare and non-impeding.

The response covers all key stages of the year with a clear overview of contrasting trends and mostly accurate data, though a few details such as nickel plateauing from October and the exact December figures are slightly imprecise.

Ideas progress logically through the year with well-managed cohesive devices and clear paragraphing linking the first half, mid-year, and final months.

Vocabulary is flexible and precise for describing change, using items like 'plunged', 'rebounded', and 'plateaued' with good awareness of style and collocation.

A wide range of structures, including contrastive and participle constructions, is used with strong control and only occasional minor slips such as spacing before punctuation.