Where was the first wheel invented?

Ineed to have answers for numbers 2-4 reply to this question

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.)chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

Ahistorian who compares the expansion of political systems to the expansion of economic systems is organizing history by