Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 19 · 2026-11-04

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 circle diagram illustrates the production of ethanol by the biofuel. The image clear that how is coemplete the producing of ethanol. Overall, the image have several steps. In first of all, the plants and trees grow by catching energy to sunlight carbon dioxide. The tractor use the fuel for harvesting the suger plants. After the harvesting pre processing and give the items of suger for cellulose its share for processing then suger birth. Now suger vaste microbes added and transfer the ethanol. He creates gass for car, truck, aeroplane and vaste some energy in air. Carbon dioxide very important for plants and trees.

For my perspective, this process is suger cane.

AI examiner evaluation

Task Achievement / Task Response: Band 4.0

You identify the topic and mention several relevant stages, including plant growth, harvesting, processing, microbes and ethanol, so the response is connected to the diagram. However, the process is only minimally described: the sequence is unclear in places, and key details such as cellulose becoming sugars and the transport uses of ethanol are not accurately explained. The claim that the tractor uses fuel for harvesting is not shown, and the final comment that the process is sugar cane is unsupported. There is also no clear overview of the cycle, especially the return of carbon dioxide to the plants. The response is 112 words, below the required 150, which further limits how fully the task is addressed. Develop the stages in order and report only information shown in the diagram.

Coherence and Cohesion: Band 4.5

There is a basic attempt to follow the process from plant growth through to ethanol and its use in transport, and the opening and closing sentences give the response a loose frame. However, the stages are not consistently linked: for example, “pre processing and give the items of suger for cellulose its share for processing then suger birth” is difficult to follow and obscures the sequence. Connect each stage with clear transitions such as “next,” “after this,” and “finally,” and use separate paragraphs for an overview and the detailed stages. The final sentence about sugar cane feels disconnected from the description. More orderly sequencing and clearer links between ideas would make the account easier to understand.

Lexical Resource: Band 4.5

The response uses some relevant process vocabulary, including “harvesting,” “processing,” “microbes,” “ethanol,” and “carbon dioxide,” showing an attempt to describe the diagram rather than relying only on general words. However, vocabulary is basic and often inaccurate or unclear, which strains communication. Examples include “suger birth,” “suger vaste,” and “gass”; these do not clearly express the stages or outputs. “The circle diagram” is also an imprecise description of a process diagram, and “catching energy to sunlight” is an awkward phrase. Use the diagram’s exact terms, such as “sugars,” “cellulose,” and “sunlight,” and choose precise process verbs such as “is converted into” or “is released.”

Grammatical Range and Accuracy: Band 4.5

You attempt a few connected sentences and use some sequencing language, but sentence structures are mostly simple and frequent grammatical errors make several statements difficult to interpret. For example, “The image clear that how is coemplete the producing of ethanol” lacks a clear clause structure, while “the plants and trees grow by catching energy” has an unclear verb pattern. There are also problems with articles, agreement and verb forms, as in “the image have several steps” and “The tractor use.” Practise building accurate subject–verb–object sentences first, then combine stages with clauses such as “After the plants have grown, they are harvested.” Check verb agreement and sentence boundaries when proofreading.

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

Browse more IELTS Writing model answers or get your own writing scored by the same AI examiner.