Diabetes, I think it’s tgis
Muscles are also necessary for movement: They're the masses of tough, elastic tissue that pull our bones when we move. Together, our bones, muscles, and joints — along with tendons, ligaments, and cartilage — form our musculoskeletal system and enable us to do everyday physical activities.
Older adults have learned how to better cope with stress from life experiences.
Explanation:
It's quite obvious. Older adults have gone through a lot of ups and downs. They are generally calm as compared to people of less age.
(This is very similar to the Dunning Kruger Effect)