The northern hemisphere? I don't completely understand the question.
Floods are beneficial to agriculture because it carries deposits
that makes soil fertile, It can also rid of any
contaminates on the land
Answer:
Darwin's main contribution to the theory of evolution was his theory of natural selection.
Explanation:
Natural selection is the phenomenon that some organisms from a particular population fit better into their environment, that is, are more likely to provide surviving offspring than less well-adapted organisms. The best adapted organisms will increasingly gain the upper hand within the population (survival of the fittest). It is thus one of the mechanisms of evolution. Mutations in, and recombinations of, the genetic material of the organisms cause the genetic variation in the population, allowing this selection.
Answer:
Generally cities cause people to become more liberal, have a social hierarchy, and promote the general abundance of transportation.
Explanation:
Socially, you can have tenements form, races can self and forcefully segregate, and people tend to become more liberal with exposure to other races.
Cultural is kind of related. People tend to clump into ideological groups (if you can give me the context of the question I can better answer).
Political life, like I said they tend to become more liberal. If your question is centered around the 1920's you could discuss child labor laws.
The encomienda system was a labor system instituted by the Spanish Crown in the American colonies.
