Question

What is a topic sentence? a sentence that repeats the main idea of the paragraph a sentence that supports the main idea of the paragraph a sentence that includes the main idea of the paragraph the sentence that always appears at the beginning of the paragraph

Answer 1

A topic sentence is a sentence that includes the main idea of the paragraph.

Step-by-step explanation:

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Answer 2

A topic sentence is a sentence that includes the main idea of the paragraph.
It is a sentence that is usually found in the beginning of a paragraph, although not always. It is the sentence that states what the main idea of that particular paragraph is, and then the paragraph is there to support this sentence, not the other way round.