What two structures create movement?

Muscular and Skeletal

Explanation:

Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position.  The nervous system tells the muscles to contract, but since you can only choose two, I would say muscles and bones. Without the bones, there would be nothing to move.

according to e2020 te answer is c. continuity.