I think is Asia, but I could be wrong
(but it probably is so yei)
the answer is C because through common sense it makes sense.
The number of people per square mile is the population density
There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water.