I believe that would be Mesopotamia, the seat of the Sumerian and Akkadian civilizations.
Source: Studied this last week. :)
Answer: Its "D"
Explanation:
the answer is D due to lakes rivers and mountains being natural barriers. Which in turn creates a boundary between to states or countries.
A man made lake where water is collected and stored is called a reservoir
Many lianas start life in the rainforest canopy and send roots down to the ground. The leaves of forest trees have adapted to cope with exceptionally high rainfall. Many tropical rainforest leaves have a drip tip. ... Plants need to shed water to avoid growth of fungus and bacteria in the warm, wet tropical rainforest.
