Question

Why do the authors include Part 4 in this section? How is Part 4 related to the claim?

Answer 1

Part four is related to the claim because it talks about economy and talks about overall population

Answer 2

It might be stated that part 4 is included in order to provide a data-support information, that is to say, that this is not just an opinion but there have been researches on the matter, such as census and polls which might add validity to the statements. This is a way of showing that there is enough information to support the topic discussed.