What is a marine protected area?
a) the area near the shore of a country where foreign fishing is prohibited.
b) an area where the ocean is protected from some or all human activities.
c) an area where there is absolutely no fishing allowed.
d) an area where the coastal zone is vulnerable to erosion.

B) An area where the ocean is protected from some or all human activities. is the answer

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.