Answer:
Irrigation is the spreading of water over crops for the purpose of farming. The way it's done can vary, but its general use is as described above. Sprinklers and aboveground canals are two examples of it.
Assimilation is the process by which a person or people acquire the social and psychological characteristics of a group.
The immigrants and natives in America formed a melting pot, meaning their cultures, beliefs and communities blended together overtime. This assimilation allowed for an Irishman, once discriminated against, to gain the respect and prestige to become President.
During the wake of The Civil War the North had sustained very little destruction compared to the South.
