Which of the following describes the changes that occur during the third week of the menstrual cycle

You didn't give the available options but week 3 of your menstrual cycle is called Luteal or premenstrual phase

This phase starts on ovulation day, the day the egg is released from the egg follicle on the ovary.

If the egg is fertilized by sperm and then implants in (attaches to) the endometrium, a pregnancy begins. (This pregnancy is dated from Day 1 of this menstrual cycle.)If the egg is not fertilized or does not implant, the endometrium begins to break down. hope this helps!

You can literally find this on google of each science career and search up what type of training you need and how many years in school

Awould be the answer