Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · 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 4.0)
The diagram shows us the process of making a biofuel ethanol.
Starting from growing plants and trees with help of energy through sunlight and carbon dioxide and multiples process occures for final shipments.
In a diagram we can clearly see the process of biofuel ethanol.Firstly starting from digging plants and trees by providing energy with help of sunlight and carbon dioxide after that next step is to harvest them for pre processing and then toward cell
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 3.0 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 4.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 4.0 |
Task Achievement / Task Response — Band 3.0
The response fails to meet the minimum length requirement of 150 words, coming in at only 76 words. Consequently, the description of the process is severely truncated and incomplete. The student mentions growing plants, sunlight, carbon dioxide, harvesting, and pre-processing, but abruptly stops before covering the entire cycle, missing crucial stages such as processing into sugars, adding microbes, ethanol production, and the release and recycling of carbon dioxide. Because the response is underdeveloped and lacks a comprehensive overview of the main features, it falls under the lower band descriptors.
Coherence and Cohesion — Band 4.0
The writing lacks adequate paragraphing and structure due to its extreme brevity. While the student attempts to sequence ideas using transition markers such as 'Starting from' and 'Firstly starting from', the progression breaks down entirely as the text trails off mid-sentence ('and then toward cell'). There is a lack of overall logical organisation, and cohesive devices are repetitive and poorly handled, preventing the text from forming a cohesive whole.
Lexical Resource — Band 4.0
The vocabulary used is very basic and repetitive, with inaccurate lexical choices such as 'digging plants and trees' instead of harvesting or uprooting them, and 'multiples process occures'. The range of vocabulary is severely limited and inadequate for a complete task response. Word choice errors and awkward collocations cause significant strain for the reader.
Grammatical Range and Accuracy — Band 4.0
The grammatical range is extremely restricted. The text consists of fragmented and run-on sentences with severe structural issues, such as 'Starting from growing plants and trees with help of energy through sunlight and carbon dioxide and multiples process occures for final shipments.' There are frequent errors in word form, missing articles ('with help of energy'), and incorrect verb forms ('occures'). The response ends abruptly mid-sentence, demonstrating a complete lack of control over sentence structure.
See this exact question answered at other band scores — the same prompt compared across bands.
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