What occurs at the end of a female’s monthly cycle?

The luteal phase begins after ovulation. It lasts about 14 days (unless fertilization occurs) and ends just before a menstrual period. In this phase, the ruptured follicle closes after releasing the egg and forms a structure called a corpus luteum, which produces increasing quantities of progesterone.

Explanation:

the answer is a. adolescence

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relationship between pressure and air volume and led to the understanding of how respiration works; i believe this is the correct answer ; /// good luck