The diagram below shows how a biofuel called ethanol is produced.
Sample Response
The provided diagramflow chart delineates the cyclical process of producing ethanol, a sustainable biofuel, from plants and treesorganic plant matter. Overall, the diagram illustrates a closed-loop system comprising nine distinct stages, which can be broadly categorized into biomass cultivation, chemical conversion, and combustion, culminating in the reabsorption of emitted carbon dioxide to sustain the cycle. The process commences with the Deletephotosynthesis-driven growth of plants and trees, which absorb sunlight and atmospheric carbon dioxide. Upon reaching maturity, this biomass is harvested using agricultural machinery and subsequently undergoes pre-processing to produceisolate cellulose. This fibrous material is then subjected to rigorous processing in a laboratory or industrial facilitychemical processing to extract fermentable sugars. Following this extraction, specific microbes are introduced to the sugar solution, to producetriggering a fermentation process that synthesizes the final ethanol product. In the concluding phase, the generated ethanol serves as a combustible fuel for various modes of transport, including private automobiles, heavy goods vehicles, and aircraft. The combustion of this biofuel releases carbon dioxide back into the atmosphere. Crucially, this emitted gas is not merely a waste byproduct but is reabsorbed by the next generation of growing vegetation, thereby completing the sustainable ecological loop and ensuring the overallprocess's renewability.
Why this response received Band 9.0
The response presents an exceptionally clear, precise, and fully developed description of the ethanol production cycle, accurately capturing every stage and its cyclical nature. The writing demonstrates sophisticated cohesion alongside advanced grammatical structures and vocabulary. To maintain this level of excellence, continue ensuring that highly specific technical descriptions remain strictly grounded in the provided diagram labels.
IELTS Writing Criteria Scores
Task Achievement
The response provides a comprehensive overview and accurately details all key stages of the process without any factual errors.
Maintain this high standard of accuracy by ensuring externally added context remains tightly aligned with visual prompt features.
Coherence and Cohesion
Information and ideas are logically organized with seamless paragraphing and a natural flow throughout the text.
Continue using a variety of sophisticated transition signals to link complex process stages smoothly.
Lexical Resource
A wide range of precise, topic-specific vocabulary is used naturally and appropriately.
Focus on consistently selecting exact lexical terms that match visual data without relying on external assumptions.
Grammatical Range and Accuracy
A broad variety of complex grammatical structures is employed with complete flexibility and accuracy.
Sustain this level of grammatical precision across diverse complex and compound sentence forms.
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IELTS Academic Writing Task 1
The diagram below shows how a biofuel called ethanol is produced.
Your response
Write the task yourself, then compare your choices with the annotated response.