Answer: A bank uses the resources of many customers to help finance loans to a few.
Explanation: A collective immunity is like a group of people being immune. And if all those people get immunized, then the people who can't physically get immunized will be okay. Now think of the collective immunity as a bunch of people that keep their money in a bank. Someone needs a loan from that bank because they don't have enough money, the "collective group" of people are helping that person out.
The person who performs the action is the child. So the answer is A
It is the main idea of your concept... It's the thing that you try to explain
Answer C. to show examples of reasons books have been bannws