What can typically be found in an encyclopedia?

An encyclopedia is designed to be a comprehensive reference work that provides a wide range of information on various subjects. It covers topics across the spectrum of human knowledge, including history, science, culture, and more, often giving readers a general overview and key details about a subject. This allows users to gain foundational knowledge or quick facts on many different topics, making it a valuable resource for research and learning.

While the other options suggest narrower focuses, such as only historical summaries, specific instructional guides, or literary collections, an encyclopedia aims to be inclusive and informative across numerous areas of interest. This breadth of coverage is what distinguishes an encyclopedia from other types of reference materials.