John wants to become a better swimmer. So, he lifts weights three times a week, runs four times a week, and bicycles once per week. Is John using the principle of specificity? Why or why not?

Does anyone have an answer to this question? if so me.

Frankie is having difficulty developing a friendship with histeammate curtis. whenever frankie invites curtis to hangout with him at the park, curtis always says that he's busy.what is most likely preventing a healthy relationship fromforming? a)the boys are not being generous with their time andeffort.b)the boys are not communicating.c)both boys are too busy.d)the boys are on different teams.

Rotation of the head is made in atlanto-occipital joint or not?