A person, book, document, website or record that provides information is called a : source
Source is anything that could be used to support your writing. For example, if you wanted to write about the world war II, one of your source could be a veteran that was involved in it.
Some states do not have income taxes
A short distance... is this a multiple choice?
The answer is defender because in order for a security community to defend themselves or to gain the position of being the best defender, they should have the ability of being the best attacker for one couldn't just shield themselves from harm because in order to protect themselves, they must fight back or attack. Because defending themselves wouldn't improve or gain any changes as they try to win.