The name for such a hole is "caldera" which is a word of Spanish origin meaning "a pot" or a "cooking pot" (thing of cauldron!) - and this word is used because it resembles the shape of this hole.
Often the Calderas are filled with water forming lakes and often there is an island in the middle of the water.
Answer: Small, stable population
Explanation: Superpowers tend to have a larger more bulky population compared to their counter-parts with a small more controllable population, (hence, stable.)
Answer:
Fossil fuels are carbon-based energy sources like coal, oil and natural gas created from decayed plants and sea creatures that accumulated in the oceans. A biofuel is any fuel that's made from plant materials
Explanation:
I think higher but I'm not 100% sure
