Amolecule of carbon moves through various media during the process of its cycling. in which medium will it move the fastest?
a.
soil
b.
air
c.
biota
d.
runoff water
e.
oceanic water

the answer to your question is sperm

c

explanation:

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 : )