Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 19 · 2026-09-13

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)

this diagram illustrate the information about how ethanoal in made and hows its processed to used in vehicels.

This diagrams shows the process in detail from raw material to the final product is made through a series of process, the process is simple but complicated.

The first of all things is the raw material which are plants and tree which uses carbon dioxide and sun light to grow, after being grow, these plants are harvested and then pre processed by the pre processor to porduce cellulose,

this cellulose is then sent to a processing lab to produce sugar though a specfic process by adding chemicels, moreover, microbes are added in that processed sugar to create Ethanol, and then this fuel is used to run diff type of vehicels, like planes cars and trucks.

these vehicels produce a lot of carbon dieoxide. which is again used by plants to grow.

in conclusion, it is a complete eco friendly fuel to be used in our daily life, and it is not harmfull at all, it is an great invention to fullfill our needs

AI examiner evaluation

Task Achievement / Task Response — Band 5.0

The response attempts to summarize the main stages of the ethanol production diagram, starting from plants growing through to fuel usage and carbon dioxide absorption. However, the overview lacks precision and contains some inaccurate details compared to the diagram, such as claiming the process is 'complicated' and misinterpreting how the steps connect. Furthermore, the final paragraph includes personal opinion and over-generalization ('it is not harmfull at all, it is an great invention') rather than strictly reporting features of the visual data. Key comparisons and overarching trends are largely missing, placing this performance at Band 5.0.

Coherence and Cohesion — Band 4.0

The response suffers from severe paragraphing issues, as it is largely presented as a single giant run-on paragraph or disjointed block of text. Cohesive devices are minimal, highly repetitive, or mechanical, relying heavily on basic linkers like 'and then', 'moreover', and 'the first of all things'. There is a lack of clear logical progression and referencing is sometimes ambiguous, making the flow of information difficult to follow. These features reflect the characteristics of Band 4.0, where information and ideas are not arranged coherently.

Lexical Resource — Band 4.0

The vocabulary used is basic and repetitive, with numerous spelling errors throughout the text (e.g., 'ethanoal', 'vehicels', 'porduce', 'chemicels', 'dieoxide', 'harmfull'). The writer attempts some less common vocabulary items like 'cellulose', 'microbes', and 'pre-processed', but these are undermined by frequent lexical inaccuracies and poor word formation. While the terminology of the diagram is occasionally touched upon, the overall range is limited and spelling mistakes occasionally strain the reader, matching the Band 4.0 descriptor.

Grammatical Range and Accuracy — Band 4.0

The response demonstrates a very limited range of sentence structures, consisting almost entirely of long, rambling run-on sentences joined by coordinating conjunctions like 'and' and relative clauses. There is a complete lack of proper punctuation, leading to massive comma splices and missing capitalizations at the start of sentences. Grammatical errors are highly frequent (e.g., 'plants and tree which uses', 'after being grow', 'sugar though a specfic process'), which severely impedes readability and distorts meaning in places, placing the grammar firmly at Band 4.0.

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

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