Question

The ethnic makeup of the Andes and the Pampas A. has little diversity. B. is relatively wealthy and advanced technologically. C. is almost entirely descended from Spanish conquistadors. D. is greatly influenced by the geography of the region.

Answer 1

The answer to this question is  D. is greatly influenced by the geography of the region.
If we take a look at the Geographical position of The Andes and the Pampas, it's covered by the sea on its southern, western, and eastern part.
So, the people that resided in this region are secluded from the rest of the world (unless from the northern region ), which pretty influence the uniqueness of their ethnic makeup

Answer 2

D
I hope that this helps!