In passage 8, author mainly uses the comparison which is a rhetorical strategy and method of organization in which a writer examines similarities or differences between two things. The article says that future of the world need children; however, there are some preconditions. ‘But it is with the nourished, educated, and loved children. It is not with the starving, uneducated, and ignored.’(Montgomery, Page 541) the purpose of Montgomery using comparison in this sentence is to tell audience that if there are too much children in the world, less resources can be shared with each child and there will be more uneducated and ignored children. But the fact is: our future needs children who are been taken good care of. With the comparison, the readers can understand the importance of birth controlling better. Cause no one wants to live in the terrible future. In passage 11, he also mentions that ‘if everyone shared equally, we would all be suffering from protein-deficiency brain damage-and that would probably be true even if we ate every last animal on earth.’(Montgomery, Page542).Montgomery compares personal interests - if we don’t share resource with others, on one hand, we wouldn’t encounter many potential dangers, on the other hand, we are able to have sufficient food for ourselves, for our children. Everyone wants to give their offspring best resources. Through comparisons, the tone of Montgomery can be passed to the audience strongly - the birth control and no sharing with others are substantial.…