Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · Cambridge IELTS 19 · 2026-10-16

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)

"The topic disscussess bio fuel called ethanol.Firstly,Energy is relase in plants and tress.After harvesting present. Morever Harvesting cut many tress and plants.And pre processing present.While precprocessing converts into Cellulose.The Cellulose is converted into Processing.The Processing is called Sugars.However after conversion os sugars many Microbes added.There are several reasons by which ethanol is releases.For example:Truck,Cars,AEeroplanes by which carbon dioxide releases,And carbon dioxide then converted it into Energy.These are all pre proccessing of ethanol,And this is the recycling of ethanol produceres.And many causes in which different types of transports are present.After ethanol biofuel is produce.The biofuels is converted into ethane.Over all this is the process in which biofuels are formed ethanol chemical.And then ethanol chemical releases the harmful effects.By production of bioguel production ethanol is formed.When biofuel is produced.The ethanol is formed.These are correlations with each other.Bascially its a process of biofuel production and ethanol.A ethanol is chemical which produce in labotory."

AI examiner evaluation

Task Achievement / Task Response: Band 4.5

The response identifies the general subject as ethanol production and mentions several relevant labels, including harvesting, cellulose, sugars, microbes, transport and carbon dioxide. However, the process is only minimally described and key relationships are often misreported: for example, “Energy is relase in plants” reverses the diagram’s role of sunlight and carbon dioxide in plant growth, and “The Processing is called Sugars” confuses a stage with its output. The account also says ethanol becomes ethane and claims it is produced in a laboratory, neither of which is shown. There is no clear, accurate overview of the cycle. To improve, report the stages in order and explain that carbon dioxide from transport returns to support plant growth.

Coherence and Cohesion: Band 3.5

Some sequencing is attempted through words such as “Firstly,” “after,” and “then,” and the response broadly moves from plant growth towards ethanol and transport. However, ideas are not arranged into clear paragraphs or a consistent progression, and many links are unclear or misleading. For instance, “The Cellulose is converted into Processing” does not explain the relationship between the material and the processing stage, while “These are all pre proccessing” appears after the transport discussion and disrupts the sequence. Repeated statements about ethanol being formed also make the account circular without clarifying the diagram’s cycle. Organise the response into a brief overview and ordered stages, using precise links such as “next,” “after this,” and “finally” only where they reflect the process.

Lexical Resource: Band 4.5

The response uses a few task-related terms, including “harvesting,” “cellulose,” “microbes,” and “carbon dioxide,” so the topic is recognisable. However, vocabulary is basic and repetitive, and inaccurate word choices often obscure the process. Phrases such as “Energy is relase,” “The Processing is called Sugars,” and “ethanol is releases” do not express the intended relationships clearly. There are also spelling errors, including “disscussess,” “tress,” “AEeroplanes,” and “proccessing,” alongside repeated use of “produce” and “formed.” Build a small set of accurate process verbs and collocations, such as “plants grow,” “biomass is harvested,” “cellulose is processed into sugars,” and “microbes convert sugars into ethanol.”

Grammatical Range and Accuracy: Band 4.5

The response attempts some sequencing and cause-and-effect sentences, but grammatical control is weak and sentence structures are mostly simple or incomplete. Errors in verb forms and agreement occur throughout, as in “Energy is relase,” “carbon dioxide releases,” and “The biofuels is converted.” Articles and sentence boundaries are also unreliable: “A ethanol is chemical” is not correctly formed, and several ideas run together after commas or full stops without clear clause structure. These errors frequently make relationships between stages difficult to understand. Practise writing one complete sentence for each stage, checking subject–verb agreement and verb forms, then combine related steps with accurate clauses such as “After the sugars are produced, microbes are added.”

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