The correct answer is D. Reference section
Step-by-step explanation:
In libraries, the reference section is the one that includes materials such as glossaries, almanacs, dictionaries or encyclopedias that provide factual and concise information about a topic or range of them. This differs from other sections because the materials or sources in this are non-fictional, but these are general and in most cases, they include multiple topics rather than focusing on only one. For example, in encyclopedias, you find information related to biology, geography, history, etc. According to this, you are likely to find an encyclopedia in the reference section in a library.