Answer:
jjs nkaiqiq nkdiidid ndjjqajq kkskjajq kjwuwuqi kskuwusjw jeiwjwiq
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.
Freezing point of the water is innate property. Therefore, I would say that the freezing point of water from 1 billion years ago would still be the same as to what temperature the water would freeze today. Thus, I choose letter D. 0°C.