Which of these is a learned adaption
a)a baby using a fork to eat
b)mating
c)all behaviors are learned
d)sleeping

Baby learning to use a fork.

Hope this helps!

~VERNEX

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 : )