How did the sumerians adapt to their environment to eventually create a farming surplus?

The sumerians lived in Mesopotamia in the Middle of two rivers, the Tigris and the Euphrates. While the soil was very fertil and productive, living between two rivers brought unexpected floods that caused great damage to the crops. The Sumerians eventually invented a system of ditches and irrigation to learn to control the flow of the rivers.

latin america is a region of racial and cultural diversity.  it is a group of countries and dependencies in the americas where romance languages are predominant. the term originated in 19th century france as amérique latine to consider french-speaking territories in the americas along with the larger group of countries where spanish and portuguese languages prevailed.

explanation:

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".