This would actually have to be very gradual. So, first, there would first have something to happen first in order for the other part of the body to function. Our human body consist of some many bones, which also, this would protect the internal organs and also many other things that would have to be protected. Based from learning, muscles play a huge role in this kind of aspect. They are actually the reason why things would take place. If it weren't for the muscles that we contain, our bones would be highly useless. So, this would this signify that your answer could possibly be (option A). And this was stated mainly because this sentence reads: When a muscle contracts, a bone will move.
So, when this kind of muscles would and then bend and also stretch it's self, then this would give the bones and the body the energy to moves its self.
