Answer:
A. "It maintains balance."
Step-by-step explanation:
Homeostasis is the balance of independent processes in an organism. Homeostasis allows the organism to operate efficiently since collaboration between the bodily systems are easily regulated.
To be perfectly honest, none of the other answers remotely approach biology except C "It increases food consumption", so eliminate choices B and D. It is not C since homeostasis applies to more than just the digestive system of organisms.
To quote Google's definition: homeostasis is "the tendency toward a relatively stable equilibrium (synonym for "balance") between interdependent elements, especially as maintained by physiological processes."