Answer:
C. A human shivers when exposed to cold weather.
Explanation:
Homeostasis simply refers to balance, which is desirable in the context of an organism. In this problem, the only one that demonstrates this is a human shivers when exposed to cold weather. By using kinetic energy, heat is generated, maintaining a balance, so to speak.
(btw you may find it more helpful to post these types of problems under biology in the future.)
