Answer:
Topic sentences help keep your writing focused and guide the reader through your argument. In an essay or paper, each paragraph should focus on a single idea. By stating the main idea in the topic sentence, you clarify what the paragraph is about for both yourself and your reader.
Explanation:
A topic sentence has many important duties to a paragraph.
A topic sentence must highlight the main idea of a paragraph, letting the reader know what the paragraph will be about. ... The topic sentence being at the beginning of the paragraph makes it easier for the reader to understand what the paragraph will be about.
