Agriculture played a big part in shaping the development of Mesopotamian civilization, more surplus was left and made getting food easier. With a lot of time the people were able to get food easierand new tools and technology was created because of this.
Siberia is known to have the most accessible oil reserves.
If we didn't westward expand as early as we did we wouldn't have all of the geographic patterns we have today in the U.S.
#3
**but if there are more then one answers all of the above***
