Answer:
Topography
Explanation:
A reservoir is basically a river or stream, so it can not be a reservoir. There is only one more option, topography. The answer is topography. Hope this helps!
events that occurred in the 20th century that were mainly because of the wars were the fall of four major monarchies (Russian, Austrian/Hungarian, German and Turkish) and conflicts in alliances (world war 1). and a huge event that occurred in the 20th century was the great depression.
sorry i didn't include all of it, that's as much as i could remember haha, hope this helped at least a little!

Nay Pyi Taw is the capital of Myanmar
The surrounding or condition in which a person, animal or plant lives or operates
Answer:
Ukraine
Background. On April 26, 1986, a sudden surge of power during a reactor systems test destroyed Unit 4 of the nuclear power station at Chernobyl, Ukraine, in the former Soviet Union