<span>The dialogue in "Hills Like White Elephants" focuses on the possibility of an abortion.
A man is talking to his girlfriend about her having a surgery, and although it is never directly stated, it is implied the surgery is actually an abortion. He wants her to have it, and she doesn't, and they are having an argument without even listening to each other - it is futile given that she won't do it, and he wants her to.
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Subsistence farming, also called subsistence agriculture, is a form of farming in which the family works to produce only enough goods to support the family unit, without excess intended for sale and trade. Subsistence farmers grow a variety of crops and keep several types of animals in order to cover a large range of dietary needs.
The answer to the first analogy (mystery:clue :: eraser:) would be letter d. open. Mystery is to clue while eraser is to open. The answer to the second analogy (habit: custom :: extravagant: ) would be letter c. lavish.