Hey so, I'm not a biology student but I have a question. So if someone were to not use his/her arm at all and would pass the same knowledge to their children to not use it at all then do you think that over the period it'd start to grow smaller and smaller and eventually be not there anymore? Like I've heard nature selects whats best for survival and also removes what isn't being used or there's no use for it,so anyone who knows this...tell me I'm curious (also ik I'm dumb for asking this)