Answer:
b. cell x because it has chloroplast.
Cold stun or by predator attack
Best Answer Ever: <span>The nervous and endocrine systems exert the ultimate control over homeostasis because they coordinate the functions of the body's systems. Regulation of </span>body temperature<span>, </span>blood pressure<span>, pH, and </span>glucose concentration<span> are four examples of how the body maintains homeostasis.</span>
I would say D. natrural selection
