how do physical processes such as tectonic forces, erosion and soil building affect in didfrent regions?

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.

What is the reason for the “scramble for africa”?

What was on result of the potato famine