what is the purpose of a topic sentence in a paragraph

Question

to express the central idea of a paragraph
to provide evidence for the idea in the paragraph
to explain where readers can find more information about the topic of a paragraph
to describe the most important details that will be included in the paragraph

Answer 1

The purpose of a topic sentence in a paragraph is to express the central idea of a paragraph. It serves as a guide for the reader, indicating what the paragraph will be about and setting the tone for the supporting details that follow.