The Tigris and the Euphrates rivers have always been important to civilization. These two rivers cross through the ancient area of Mesopotamia, which is considered the "cradle of civilization."
However, nowadays, the rivers cross international boundaries. This has become an important problem for the region. The fact that the rivers cross boundaries means that it becomes difficult to establish who has the right to make use of the river. Moreover, this also means that it is difficult to decide who is responsible for damage or pollution to such rivers.
The answer is b) because the definition for aggregate is a whole formed by combining several elements
One of the main factors that helped unification was the economic and political growth of the West Germany capitalist, through North American resources
.This caused a disappointing population of East Germany, which adopted a socialist regime, causing a migration of people to western Germany.
All this situation caused a great crisis in socialism, so the people pressed the rulers of eastern Germany, who were forced to open negotiations with western Germany for the fall of the Berlin Wall and the reunification of the country
