Answer:
Kids 2-5: They can ride bikes, do jumping jacks, and they can do yoga with their parents or older siblings
Kids 6-7: They can also ride bikes, go running, they could swim (if they know how too), and they could also do some workout videos for kids online
Explanation
cartilage and calcified bone work together to help you move.
According to a quick g-o-o-g-l-e search, D. Reflexology, seems to be the correct answer!
In short, reflexology is a type of massage that involves applying varied amount of pressure to the feet, hands, & ears.
Hope this helped!
(If I'm wrong, please let me know in the comments)