I believe it is the nervous system but I'm not 100% sure
Painful periods.
pain in the lower abdomen before and during menstruation.
cramps one or two weeks around menstruation.
heavy menstrual bleeding or bleeding between periods.
infertility.
pain following sexual intercourse.
discomfort with bowel movements.
They could go for a hike or a walk. Hikes in a nearby forest are a great way to see nature on a daily basis and free of cost. If in an non rural area, such as a city, walking around town is a great way to get more physical activity! Another great way is to visit a zoo; most zoo have walking distance between the different animals. You can get both the active and nature in that as well.
(And I can't think of another one sorry)
The answer is D) Can contribute to fear of looking foolish