Why does music help calm people's minds or body?

Music is used all over the world, to express yourself, or to help calm the mind and body from stress. But how does music do all these things? Studies show that music helps with just about everything. Helps you think, helps with busy work to get your mind off of stress. Music is like an animal that you pet. So the animal calms you down when you pet it, right? Music does the same thing. Have you noticed that? And also some music helps with studying. Music is just awesome.