Where do poison frogs get their poison? How do spider monkeys discourage intruders? What scientific family do prairie dogs belong to?
If you're using the Brittanica PreK-8 database offered through the library's web site, you could find the answers to these questions* easily.
Sure, you could go to Google, but with the Brittanica database, you know immediately that the information you are getting is accurate and reliable - it comes from the folks who write the encyclopedia, after all.