Can someone help me with this :)

mutualism

Explanation:

they both benefit from each other or both mutually help each other

answer; i believe that the best answer is (secondary cardiac arrest due to

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )