What is a topic sentence?

a sentence that contains supporting details
a sentence that contains the main idea

3 answers

In a paragraph or essay, a topic sentence is a sentence that introduces the main idea or topic of the paragraph. It is typically the first sentence of a paragraph and sets the tone for the rest of the content. The topic sentence gives the reader a clear idea of what will be discussed in the paragraph and helps to guide the reader through the main points.
What’s the answer
A topic sentence is a sentence that contains the main idea of the paragraph.