Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 19 · 2026-09-22

IELTS Writing Task 1 question

 

The diagram below shows how a biofuel called ethanol is produced.

Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 4.5)

The presented diagram demonstrates how ethanol is produced from biofuel.

Overall, it is clear that the process is quite lengthy and how sunlight and carbon dioxide are converted into ethanol.

To initiate with first step, formers grow plants and trees on their land which release energy, sunlight and also carbon dioxide then in the second step, formers harvets these plants and tress with the help of tractors. Then next step is pre processing through which we get cellulose. These cellulose then send to the labs where scientists add chemicals to it.

Further more

AI examiner evaluation

Task Achievement / Task Response — Band 4.0

The response fails to meet the minimum word count requirement of 150 words, stopping abruptly at only 93 words and leaving the essay incomplete. As a result, the report cannot fully summarize the information or cover all stages of the diagram, omitting crucial steps such as the processing stage, the addition of microbes, and the carbon dioxide cycle. While the writer attempts an overview and describes the initial steps of plant growth and harvesting, the severe under-length prevents adequate development of the task, leading to a low band score.

Coherence and Cohesion — Band 4.5

The essay demonstrates some basic organizational structure with opening and transitional phrases such as 'The presented diagram demonstrates' and 'To initiate with first step'. However, the logical progression is severely disrupted because the text trails off incomplete at the end ('Further more'). Paragraphing is poorly handled due to the fragmented nature of the response, and cohesive devices are somewhat repetitive and mechanical.

Lexical Resource — Band 4.5

The vocabulary used is quite basic and repetitive, featuring spelling and word-choice errors such as 'formers' instead of 'farmers' and 'harvets' instead of 'harvests'. While the student attempts some topic-related vocabulary like 'diagram', 'energy', and 'cellulose', the lexical range remains limited and inadequate for a fully developed academic task response, and communication is occasionally strained by the inaccuracies.

Grammatical Range and Accuracy — Band 4.5

The text displays a limited range of grammatical structures, relying heavily on simple and faulty complex sentences. There are noticeable grammatical and punctuation errors throughout, such as missing articles and subject-verb agreement issues in sentences like 'formers grow plants and trees on their land which release energy' and 'These cellulose then send to the labs'. These frequent errors impede the flow and accuracy of the writing.

See this exact question answered at other band scores — the same prompt compared across bands.

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