The banks of the Nile River flooded each year leaving rich soil behind. This is an example of the?

Ongoing civil wars western roman empire finally collapsed476 c.e. romulus, the last of theroman  emperors in  the west, was overthrown by the germanic leader odoacer, who became the first barbarian to rule in rome. the order that the  roman empire  had brought towestern  europe for 1000 years was no more.

Answer/// she was one of the best track- and field athletes in the history of the sport;