Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-10-16

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 the production of ethanol from plants through various process.

Overall, from trees to ethanol productiom contains 6 different steps and after that diagram shows that how ethanol again goes back to tree.

Firstly, plant is collected through harvesting process and then it goes for pre-processing with a help of a machine

AI examiner evaluation

Task Achievement / Task Response: Band 3.0

You identify the general subject—ethanol production from plants—and attempt an overview by referring to stages and a return to trees. However, the account is extremely incomplete: it stops after pre-processing and does not describe cellulose, processing into sugars, the addition of microbes, ethanol, its use in transport, or the carbon-dioxide cycle. The overview also says there are “6 different steps,” which does not accurately summarise the full process shown. The response is 54 words, below the required 150, so it cannot provide the necessary coverage of the diagram. To improve, report the main stages in sequence and explain how carbon dioxide released by transport returns to support plant growth.

Coherence and Cohesion: Band 4.5

The response has a basic sequence: an opening identifies the diagram, an overview follows, and “Firstly” introduces a process detail. This gives the reader a small amount of structure. However, the response ends abruptly after pre-processing, so there is no progression through the remaining stages or a concluding account of the cycle. The link “and then” connects two actions, but the relationships between the stages are not developed. The overview’s reference to ethanol going “back to tree” is also unclear as a connection. Organise the report into an introduction, a concise overview, and one or two paragraphs tracing the process in order, using clear links such as “subsequently” and “finally.”

Lexical Resource: Band 4.5

You use a few relevant process terms, including “ethanol,” “harvesting,” and “pre-processing,” which show awareness of the diagram’s subject. However, the vocabulary range is very limited because only the opening stages are described, and some expressions are imprecise or unnatural. “Ethanol productiom” contains a spelling error, while “from trees to ethanol productiom contains 6 different steps” does not express the process clearly. “Plant is collected” is also an imprecise way to describe harvesting. Use accurate process vocabulary throughout, such as “plants and trees are harvested,” “cellulose is processed into sugars,” and “microbes are added.” Check spelling and choose collocations that describe each stage precisely.

Grammatical Range and Accuracy: Band 4.5

The response includes simple clauses and an attempt at a longer sentence beginning “Overall,” but the range is narrow and several grammatical problems affect clarity. In “from trees to ethanol productiom contains 6 different steps,” the subject and verb do not form a clear grammatical relationship. “Plant is collected” needs an article or plural subject, and “with a help of a machine” uses an incorrect article. The final sentence is incomplete in presentation and lacks punctuation. Practise forming accurate passive sentences for process descriptions, for example, “The plants are harvested and then sent for pre-processing.” Vary sentence structures only after establishing correct articles, agreement, and complete punctuation.

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