Answer:
The skeletal system:This system controls our bones so we aren't just a blob on the ground. Our bones help keep our important organs intact.
The muscular system works about the same way, it protects your bones so they don't grind against eachother when you move. Your muscles give you the ability to move.
Our organ system is what keeps us alive, you can't clean your room if your dead and if your room is hot you need your skin so you don't overheat and die.
Lastly of course is your respitory system, you need to bring when your moving about. Our ability to breathe gives our blood cells and our heart what they need to keep working.