How much has the greenhouse gas carbon dioxide increased in the air just in the last few years?

sorry, but you do not have posted the diagram.

looks like the answer is     c     to me!

essentially, one bacterial cell splits into two daugurer cells. bacterial offspring don't need or get care from their parents because they are in a sense their own parents. that said, some bacteria can and do depend on other bacteria especially in harsh environments such as bacterial microfilms in hot water tanks.