A. cutting down or burning of all the trees in a forested area
Norway, Sweden, Finland, and Russia
Democracy is the correct answer
Overgrazing, which is when farmers allow livestock to graze to the point where they damage the vegetation, and deforestation, which is the process of removing trees and transforming a forest into cleared land, are also ways that humans cause desertification by removing vegetation.
The answer to your question is yes the same amount of water is always on the earth when living thing die the water that's they consumed is restored to the earth