IELTS Writing ①

You are a professional English professor
Below are the scoring criteria for the IELTS writing task.
The first step,
The designated topic is "Example topic: Rich countries often give money to poorer countries, but it does not solve poverty. Therefore, developed countries should give other types of help to the poor countries rather than financial aid. To what extent do you agree or disagree? You should write at least 250 words."
Answer four times according to different standards of 9, 8, 7 and 6 points.
Your answer to different scores should be preceded by the title [Answer to [different scores]]
In the second step, after completing the first step, you need to explain why your answer will not get a higher or lower score among 9, 8, 7, and 6 points. You must quote the sentences of the answer to explain specifically the difference between these answers in "completion of writing tasks, coherence and cohesion, vocabulary richness, grammatical diversity and accuracy".
In other words, quote statements from your 9, 8, 7, and 6-point answers to explain why your answer received a certain score in terms of "completion of writing tasks, coherence and cohesion, vocabulary richness, grammatical variety and accuracy."
Let's think step by step
9 points:

Completion status of writing tasks: Fully meet all writing task requirements, clearly present fully developed writing content
Coherence and cohesion: free use of cohesion means, coherent writing, and skillful use of paragraphs
Vocabulary richness: Use a rich vocabulary, be able to use and master complex vocabulary features naturally; rarely make minor mistakes, and they are only clerical errors
Grammatical Variety and Accuracy: Full flexibility and accuracy in the use of a wide variety of grammatical structures; minor errors are rare and only clerical errors
8 points:

Completion of writing tasks: The writing content fully covers all writing task requirements, and the main content/points are clearly and appropriately presented, emphasized and elaborated.
Coherence and connection: Arrange information and ideas logically, use various connection methods appropriately, and use segmentation fully and reasonably.
Vocabulary richness: Use a rich vocabulary fluently and flexibly, express ideas accurately, and skillfully use uncommon vocabulary, but occasionally make mistakes in word selection and matching, and make few mistakes in spelling and/or word formation.
Grammatical diversity and accuracy: Use a rich variety of grammatical structures, most sentences are accurate, and errors or inappropriateness only occur in rare cases.
7 points:

Completion of the writing task: The writing content covers the requirements of the writing task, (academic category) clearly presents an overview of the main trends, differences or different stages, (training category) clearly presents the purpose of the writing, the tone of the writing is consistent and appropriate, and the main content/points can be clearly presented and emphasized, but failed to be more fully developed
Coherence and cohesion: Organizes information and ideas logically, moves clearly throughout the text, and uses a range of cohesive devices appropriately, although sometimes under- or over-used, and sometimes fails to maintain consistent clarity or appropriate use of references.
Vocabulary richness: Use sufficient vocabulary, demonstrate certain flexibility and accuracy, use uncommon vocabulary, have a certain understanding of style and collocation, and may occasionally make mistakes in word choice, spelling and/or word formation.
Grammatical diversity and accuracy: Use a variety of complex grammatical structures, most sentences are accurate, have a good grasp of grammar and punctuation, but sometimes make a few mistakes
6 points:

Completion of writing tasks: Compose according to the writing task requirements, (academic category) choose appropriate information to summarize, (training category) the purpose of writing is basically clear, the tone of writing is sometimes inconsistent, the main content/key points are presented and fully emphasized, but sometimes contain irrelevant, inappropriate or inaccurate details
Coherence and Cohesion: Organizes information and ideas coherently, and generally develops the text clearly and uses cohesive devices effectively, but sometimes the cohesion within and/or between sentences is incorrect or too mechanical, and sometimes fails to maintain consistent clarity or appropriate use of references.
Vocabulary richness: Use enough vocabulary to carry out writing tasks, try to use uncommon vocabulary, but sometimes use it inaccurately, make mistakes in spelling and/or word formation, but do not affect communication
Grammatical diversity and accuracy: Uses a combination of simple and complex sentence patterns. There are some errors in grammar and punctuation, but these errors rarely affect communication.