Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-08-25

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)

This the information about biofuel called ethanol produced.

There are some part of biofuel production. start from the energy,sunlight and carbon dioxide and the ends on the ethanol.

first the sunlight give carbon dioxide to the plants and the grow up. then plants harvesting. The next process is pre processing. when the processing is complete the trees turns into biofuel and gives the carbon dioxide. The an the biofuel help to runs car, truck and also plane in the air use carbon dioxide in air. carbon dioxide is in our air. the car runs through biofuel and carbon dioxide. The truck runs through carbon dioxide and also the carbon dioxide help plan to run in air.

Carbon dioxide is a layer of space. Carbon dioxide is very important for our enviorment. In nowdays our envoirment is polluted. it cause to cut the trees and and trees turn into biofuel biofuel use in the cars, trucks and plane. and the smoke of the biofuel is polluted to our air

AI examiner evaluation

Task Achievement / Task Response — Band 4.0

The response fails to accurately describe the process shown in the diagram. Instead of summarizing the stages of ethanol production, the text provides a confused and inaccurate narrative about carbon dioxide and environmental pollution. The description of the process is disjointed, and the student misinterprets the visual information, such as claiming that 'sunlight gives carbon dioxide to the plants' and that the biofuel itself 'runs' vehicles through carbon dioxide. The main features of the diagram are not clearly identified or reported, and the response lacks a logical summary of the production cycle.

Coherence and Cohesion — Band 4.0

The response lacks logical organization and progression. While there is an attempt to use sequencing words like 'first' and 'then', the sentences do not follow a coherent path. Paragraphing is ineffective, as the text is presented in a fragmented manner. The use of cohesive devices is mechanical and often inaccurate, leading to confusion for the reader. The relationship between the ideas is unclear, and the text does not flow logically from one stage of the process to the next.

Lexical Resource — Band 4.0

The vocabulary is very limited and repetitive. The student relies on basic terms and struggles to use appropriate terminology for a process description. There are frequent errors in word choice, such as 'the smoke of the biofuel is polluted to our air' and 'the trees turns into biofuel'. The lack of precise vocabulary prevents the student from accurately describing the technical stages of the ethanol production process. Spelling errors, such as 'enviorment' and 'envoirment', are also present.

Grammatical Range and Accuracy — Band 4.0

The grammatical control is weak, with frequent errors that often impede communication. There are significant issues with subject-verb agreement (e.g., 'the trees turns'), article usage, and sentence structure. Many sentences are fragmented or lack a clear subject and verb. The range of structures is very limited, consisting mostly of simple, poorly constructed sentences. Punctuation is also inconsistent, which further hinders the clarity of the writing.

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