First Question: That is the Nile river. Egypt is the major civilization that came from the Nile.
Second Question: Tigris and Euphrates river valley. The major civilization is Mesopotamia.
Third Question: When I would wake up the first thing on my list is to eat breakfast, then I would make my way to the river closest to me to get water for my crops along with other farmers from the town. I would tend to the crops next with a plow. After I grabbed all my finished food it would start to barter with people from town. I also heard the Smith's lost their child to the Johnson's, so they get to kill him, that Hammurabi's code of law for you, eye for an eye.
The Louisiana Purchase helped to double the size of the country and provided control of the Mississippi River. The Louisiana Purchase was a massive land purchase by the U.S. from France under President Thomas Jefferson's administration.