Which of the following best describes the content of an index?

• A. It lists important words with definitions.
• B. It is a diagram used to explain how something works.
• C. It provides an alphabetical listing of names and topics with page numbers where discussed.
• D. It is the main title of the passage.

Answer: (C)

An index is a back-of-the-book tool organized alphabetically that lists names and topics along with the page numbers where they’re discussed. It helps you quickly locate where specific subjects appear in the text. This is different from a glossary, which provides definitions of terms; a diagram, which visually explains how something works; or the main title, which is just the heading of the work.