Answer:
The passage's context is <em>"survival in the wild"</em><em>;</em> how certain species thrive <em>under</em> adverse circumstances, being part of an untamed environment.
Thus if the <em>"Sand Cat"</em> is <em>"eking out a living"</em>, it definitely must be because it's likely <em>"</em><em>under </em><em>difficult conditions</em>". Thereby the most suitable answer is (C.): under.
Explanation:
Autobiography is the right answer
