AFCT English Complete Practice Test Guide

The function of a topic sentence is to provide the main idea of a paragraph. Typically found at the beginning, it serves as a guide for the reader, indicating what the paragraph will discuss. A well-crafted topic sentence encapsulates the core concept and sets the tone for the information that will follow, making it easier for readers to understand the overall structure and argument of the text. This clarity is essential for effective writing, as it helps maintain focus and coherence throughout an essay or article.

In contrast, summarizing the entire essay pertains to a broader aspect than what a topic sentence addresses. Presenting a counterargument involves discussing opposing views, which is a distinct function that contributes to a more comprehensive argument but isn't the role of a topic sentence. Listing supporting details would come after the topic sentence, as these details are meant to back up and elaborate on the main idea introduced by the topic sentence.