Final answer:
A textbook chapter about the first five U.S. presidents is an example of a secondary source in U.S. History.
Step-by-step explanation:
A secondary source refers to a source that interprets or analyzes primary sources. It provides information or commentary on an event or topic that is based on primary sources or other secondary sources. In this case, the textbook chapter about the first five U.S. presidents is an example of a secondary source. It presents historical information and analysis based on various primary sources, such as documents, letters, and journals.
Learn more about Secondary sources in U.S. History