Contains all members of a specified group.
The muscular system allows the body to move while the skeletal system provides a structure and form to our body. Without the muscular system we could not move and without the skeletal system we would not take any form.
Answer:
Action: Setting a good sleep schedule and making sure you get the right amount of sleep every night.
Barrier(s): insomnia, excessive homework/other activities, people who wake you up, etc.