Band 4.0 IELTS Writing Task 1 Model Answer
Overall Band Score: 4.0 · Cambridge IELTS 19 · 2026-09-12
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 ILLUSTRATE THE BIOFUEL PRODUCATION MEAN HOW ETHANOL PRODUCED.THE FIRST PROCESS IS HARVESTING OF PLANTS AND TREES AFTER THAT PRE-PROCESSING OF PLNATS AND DUE TO THIS CELLULOSE MADE , AFTER THIS PROCESSING IS HELD IN LABORTRIES AND IT WILL LEAD TO PRODUCED SUGARS. IN SUGARS MICROBES ADDED , SO THIS IS THE CAUSE OF PRODUCATION OF ETHANOL . THAT PROCESS CALLED THE BIOFUEL PRODUCATION. ITY CONSISTS OF FIVES STEPS OF PROCESING WHICH INDICATES US.AFTER THIS IT CAN ALSO BE REPRODUCED , AS WE ARE LIVING IN A DIDGITAL ERA WE USE CARS AND PLANS FOR TRAVELLING. THESE VEHICLES ARE RUN BY FUELS LIKE IT CAN BE HOMEAGE CAR USE OR IT CAN BE USED FOR BUSSINES PURPOSE. AFTER THIS AIRPLANE ALSO FALLS IN THIS CATEGORY. BY USING THESE THEY PRODUCED CARBON DIOXIDE WHICH IS THE CAUSE OF BIOFUEL PRODUCATION. THIS PROCESS IS A REPROCESS SYSTEM MEAN AUTOMATICALLY IT PRODUCED BIOFULE. THAT ALSO RELATES HOW ETHANOL IS MADE.
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 response attempts to address the prompt by describing the process of ethanol production shown in the diagram. However, the explanation is extremely superficial and misses key data points and stages. Furthermore, the second half of the response introduces irrelevant personal or general commentary about cars, airplanes, and the digital era, which does not accurately summarise the diagram or make required comparisons. The steps outlined are rudimentary, stating 'harvesting of plants', 'pre-processing', and 'sugars microbes added', but lack detailed reporting of the main features. According to the band descriptors, the task is only partially addressed, leading to an overall under-developed presentation of the visual data.
Coherence and Cohesion — Band 4.0
The text lacks effective paragraphing, being written as a single block of capitalised text. Cohesive devices are minimal, repetitive, and misused, with frequent reliance on transition phrases like 'AFTER THAT' and 'AFTER THIS' which fail to create a natural logical progression. The flow is severely disrupted by the abrupt transition from the biofuel process to a discussion on modern cars and airplanes. Referencing is unclear, particularly towards the end where the connection between vehicles and the production of biofuel becomes muddled and confusing. Overall, the information and ideas are not arranged cohesively, fitting the Band 4 profile.
Lexical Resource — Band 4.0
The vocabulary used is very basic and repetitive ('PRODUCATION', 'PRODUCED', 'PROCESS', 'PLANTS'). There are numerous spelling and word-formation errors throughout the response, such as 'PRODUCATION', 'PLNATS', 'LABORTRIES', 'HOMEAGE', 'BUSSINES', and 'BIOFULE'. The student attempts some less common vocabulary related to the topic, such as 'microbes' and 'cellulose', but these are overshadowed by pervasive inaccuracies in word choice and spelling that frequently strain the reader and obscure precise meaning, aligning with the Band 4 descriptor.
Grammatical Range and Accuracy — Band 4.0
The writing demonstrates a very limited range of grammatical structures. Most sentences are simple or poorly constructed attempts at complex forms that fail due to missing verbs, incorrect prepositions, and severe punctuation issues. The entire text is written in capital letters without proper sentence boundaries, full stops, or commas in appropriate places. Errors are extremely frequent and often distort meaning, such as in the clause 'DUE TO THIS CELLULOSE MADE' and 'THAT PROCESS CALLED THE BIOFUEL PRODUCATION'. These persistent grammatical breakdowns impede overall communication, placing the response firmly at Band 4.
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.