The Strait of Gibraltar .
A
connects two larger bodies of water

B
is a body of water surrounded by land on all sides

C
is a giant mass of ice that moves slowly

D
can form a lake when it melts

the correct answer: the index of refraction of the second medium is lower i tried this persons answer and it was wrong this person is lying

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.