Answer:
<em>I </em><em>think </em><em>the </em><em>answer </em><em>is </em><em>a </em><em>bullet.</em>
<em>Hope </em><em>this </em><em>helps</em>
They add clarifying information to a document. They provide details the reader may be unfamiliar with, and saving them from having to look them up (words, places or sources.)
To be safe on the Internet, we must avoid giving out personal information.
I agree with this theory to some degree mostly do to the fact that public schools are the main way to learn in most countries
