What is the purpose of a topic sentence in a paragraph?

What is the purpose of an introduction?

What is a rhetorical question?

The purpose of a topic sentence in a paragraph is to introduce the main idea or point of the paragraph to the reader. It serves as a summary or preview of the content that will be discussed in the rest of the paragraph.

The purpose of an introduction is to provide an overview and context for the topic that will be addressed in a piece of writing. It aims to grab the reader's attention, provide background information, and present the thesis statement or main argument of the piece.

A rhetorical question is a question that is posed for the purpose of emphasizing a point or making a persuasive or stylistic effect, rather than seeking an answer. It is typically used to engage the reader, provoke thought, or emphasize a particular idea or argument.