Answer:
It is called the fertile crescent because of it's close proximity to many water sources. The abundant source of fresh water caused the soil to be unusually fertile for the area and allowed for farming.
Intelligent Question! keep it up!
Freud would say that is, "it has been sublimated into a socially desirable behavior." This is sort of a defense mechanism, in which socially inadmissible driving forces or admirations are unwittingly changed into socially adequate activities or conduct, perhaps bringing about a long haul transformation of the underlying motivation.