Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-09-21
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)
I'll illustrate the process of diagram ,In this diagram how to produced ethanol . I will sumaristhe information about the process of ethnol.
Well, first of all plant and trees grown by get energy from sunlight and carbon dioxide . when plant reached on meturity then farmer start harvest of the plant .After the harvesting of crops then start the procees ,next step is cellulose,then they analise in lab adding different chemical into product then convert into sugars . after the process of sepration of sugar add microbes in sugar then become in liquid form . everystep take examine into lab after clear from lab process then convert into ethanol shape .
After the process carbon dioxide shipment all over the world through different channel ,like shipment by aeroplane ,by truck and car . carbon dioxide spread in whole world . all the proceess is very amazing and heart cathing .
AI examiner evaluation
| Criterion | Band |
|---|---|
| Task Achievement / Task Response | 4.0 |
| Coherence and Cohesion | 4.0 |
| Lexical Resource | 4.0 |
| Grammatical Range and Accuracy | 4.0 |
| Overall | 4.0 |
Task Achievement / Task Response — Band 4.0
The student attempts to describe the process diagram showing how ethanol is produced, meeting the word count requirement with 151 words. However, the response falls short in terms of task achievement due to significant omissions and misinterpretations of the visual data. The text lacks an effective overview of the circular process. While some stages are mentioned, such as sunlight, plants growing, harvesting, cellulose, processing, and adding microbes, the progression is confusingly described and includes inaccurate details not present in the diagram, such as 'analise in lab adding different chemical' and 'carbon dioxide shipment all over the world'. The relationship between carbon dioxide absorption and release in the cycle is poorly communicated. Consequently, this performance aligns with Band 4.0 descriptors.
Coherence and Cohesion — Band 4.0
The organization and cohesion of the text are extremely weak, placing it at Band 4.0. The writing is broken into informal, conversational conversational snippets rather than standard academic paragraphs ('Well, first of all...', 'all the proceess is very amazing and heart cathing'). There is a lack of logical progression throughout the response, and cohesive devices are either absent, repetitive, or inaccurate. Pronoun referencing is frequently unclear, leaving the reader confused about what 'they' or 'then' refers to. Paragraphing is not used effectively to separate different phases of the circular cycle.
Lexical Resource — Band 4.0
The vocabulary used is extremely basic, repetitive, and occasionally non-standard, which limits the response to Band 4.0. The student relies on rudimentary terms ('plant', 'harvest', 'sugar', 'liquid') and makes frequent spelling and word-choice errors ('sumaristhe', 'ethnol', 'meturity', 'procees', 'sepration', 'everystep'). There is no evidence of less common lexical items appropriate for an academic process description, and inappropriate subjective commentary is included at the end ('heart cathing').
Grammatical Range and Accuracy — Band 4.0
Grammatically, the response is heavily flawed, demonstrating a very limited range of structures and frequent, persistent errors that often obscure meaning. The writing contains numerous fragments and run-on sentences, such as 'I'll illustrate the process of diagram ,In this diagram how to produced ethanol .' Subject-verb agreement, tense consistency, and auxiliary verb usage are faulty throughout ('plant and trees grown by get energy', 'when plant reached on meturity then farmer start harvest'). Punctuation is also misused. These pervasive structural errors place the response firmly at Band 4.0.
See this exact question answered at other band scores — the same prompt compared across bands.
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