Which of the following is a true statement about the function of a topic sentence?
It is the most important sentence in a paragraph.
It presents the main idea of the entire composition.
It only appears in the introductory paragraph.
It sums up a minor detail of the paragraph.
The correct answer should be It is the most important sentence in a paragraph
Topic sentences are brief explanations about what the paragraph will be about. It involves major, not minor details, and appears in almost every paragraph.