Where the sidewalk ends , please give me all the answers. You will get 10 points

Read the excerpt from it's our world, too! : young people who are making a difference.the author’s purpose in this excerpt is to

Respect for the environment means a: loving trees and animals b: not drinking out of streams c: making as little impact as possible on wilderness areas d: only using resources that are high in supply

What is wrong with they follow citation of a book with two authors