Answer:
D. Caldera
Explanation:
Caldera
(noun)
a large volcanic crater, especially one formed by major eruption leading to the collapse of the mouth of the volcano.
Your answer would be as said above *Caldera*
Answer:
Loess
Explanation:
Loess is a sedimentary deposit that covers around 10% of Earth's land.
Answer:
No
Explanation:
Cities are a part of a country there may be some that were countries or are their own country but the answer should still be no.
Poor air and water quality, insufficient water availability, waste-disposal problems, and high energy consumption are exacerbated by the increasing population density and demands of urban environments. Strong city planning will be essential in managing these and other difficulties as the world's urban areas swell.
Unless you have some classified the answer is no. United Stated and Russia are not in an official Cyber War, although I would not be surprised if we would soon find out they are going at one another through those means.
