In 1970 when the Aswan High Dam was completed, the annual Nile floods and sediment stopped for most of Egypt's civilisation which lived downstream. In addition to creating electricity, the dam allowed Egyptians to control the flow of water and build upon the Nile's banks with certainty that it wouldn't be flooded.
Movement.... i think there is a theory to it ....
The highest point above sea level is an elevation. The difference between the highest and lowest point in an area is a relief.
Answer:
Great Britain, France (except during the German occupation, 1940-44), The Soviet Union (after its entry in June 1941), The Unites States (after its entry on December 8th, 1941), and China.
