How do I explain benefits from diffusion of agricultural practices. I'm stumped. (100pts for halp)

What is the primary justification of the hypothesis that the early earth environment was void of oxygen? ( 2 points) data showing the concentrations of gases extracted from rocks fossil evidence regarding the origin of eukaryotes generally accepted atmospheric conditions molecular evidence based on evolutionary traits.

If a population is growing quickly in a small area then what must increase as well

Which of the following statements best explains why there tends to be a greater number of large cities in southern africa than the east africa