From the list of individual sports in which an individual can compete, like swimming, diving, running, ice skating, wrestling, gymnastics, golf, tennis, skateboarding, in-line skating, biking, martial arts, and bowling, I think that swimming would be the most strenuous to play because it requires strength in specific muscle groups, endurance, and lots of power.
Answer:
1. Old age is a time to grieve one's losses and physical limitations.
A as it is most stressful and a very lonely time hope this helps