Trevor needs general information to begin his research paper on mammals in the Southern Hemisphere. Where will he find the best information?

An encyclopedia is the best place to begin when you need general background information about a topic. Trevor can use one to learn basic facts about mammals and the Southern Hemisphere before narrowing his research. An atlas focuses mainly on maps, and an almanac is a reference for facts and statistics, so the best choice is encyclopedias.

AI-written and checked against the verified answer.