SOS:
The answer is <em><u>gametes!</u></em>
<em>Hope this helps!</em>
Explanation:
Prolactin is a protein hormone of the anterior pituitary gland that was originally named for its ability to promote lactation in response to the suckling stimulus of hungry young mammals.
Progesterone is a hormone released by the corpus luteum in the ovary. It plays important roles in the menstrual cycle and in maintaining the early stages of pregnancy.
The answer is fundamental niche
B is the correct answer I think it might be wrong tho