This diagram shows a feedback loop in the human body that helps maintain homeostasis. Which of the following is the most likely function of this feedback loop?

(1 point)
Responses

regulation of calcium levels in the blood
regulation of calcium levels in the blood

conversion of calcium to PTH
conversion of calcium to PTH

storage of calcium in the kidney
storage of calcium in the kidney

breakdown of calcium in the small intestine

regulation of calcium levels in the blood