The answer is A because it states differ which means contrast.
They left rich soil when flood waters receded. So the correct option for the given question is option "d". It has been seen that rivers carry with them very rich and fertile soil which the farmers prefer because the amount of crop and the quality of crop is much better than they can get in any other place. The civilization of ancient Egypt as well as the Indus valley civilization were totally dependent on the Tigris and the Indus river respectively, as far as irrigation was concerned. Seasonal flooding always brings with it new fertile soil for irrigation.
The invention and creation of the telegraph made a faster and cheaper method to send information across the nation, The Pony Express ended because of an advance in technology.
B, Irish. The Irish immigrants came to America along with Germans to find work and money etc.
