Which is an example of the body maintaining homeostasis using a negative feedback loop?

a. during a woman’s menstruation cycle, the hormone estrogen triggers glands in the brain to release hormones that cause the ovaries to release more estrogen.
b. when a cut occurs on a person’s skin, the body causes more and more platelets to accumulate in the blood in that region, causing a clot.
c. during childbirth, a woman’s body releases hormones to promote the process and to increase contractions until the child is born.
d. when a person is losing balance, the body senses the position of the head and sends signals to keep balance.