Well it is important to know the geography of all places but u might want to so u know the language, traditions, and where is where if u r visiting.
I don't know whether this was one of your options, but South Asia can be very well characterized as a Sub-continent.
In fact, it's is commonly referred to as "the Indian Subcontinent" or even simply "Subcontinent". One of the reason for a distinction of this part of the land is that it lies on a different tectonic plate.
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Answer:
<h2>Mao Zedong turned China communist and is responsible for more deaths than any</h2><h2>leader in history.</h2>
Answer: D. the height of a given point above sea level