Glue secreted by seaweed or barnacles is an adaption to which of the following environments?

A shallow oceanic
B rocky intertidal
C deep ocean
D sublittoral

substitution is the answer in this case

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.

the question isn't complete here so i can't right an answer '_'

the correct answer is d