Self harm is a very unhealthy way to deal with stress, anxiety, and any other type of unusual situation. It can be very dangerous to your health and leave permanent damage on your body and soul. If you know anyone who is self harming be sure to tell an adult and be as supportive as you can. You never know what someone might be going through! :)
Its called the hypothalamus or neurons
both mean the samething
Now that I think about it, it would be A and B because you need your bones for support and they also protect your organs. As for D it's the other way around your muscles help your bones move.
A good way to find that out is to calculate the number to get an estimate. for example, about one in every 12 people has asthma. so take the population of new york, and divide it by 12 to get an estimate of a number of people in the state of new york that might have asthma.