Answer:
The details from "The Oasis: Africa" best support the central idea that nature can be severe and unkind are "For eight weary days we had crawled across the burning desert."
Explanation:
The sentence "The Oasis: Africa" best support the central idea that nature can be severe and unkind are "For eight weary days we had crawled across the burning desert." is the only one that talks about natural elements and how harmful they can be to humans, the other options talk about poverty and consequences of it.
I got hit with a baseball right in the back of the skull, I saw two of everything for a week and I still had to carry a block of ice home every afternoon.
Sure! How about a cat standing in front of a mirror looking at its reflection. Instead of seeing its true reflection (reality), it sees itself as a great big lion (perception).
Hope I helped!