Oque é hidrosfera terrestre? do que ela é formada?

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.

Explain why the rate of urbanisation is in the way it is between developed and undeveloped countries.

What are the answers for the following questions?