Answer:
There are three parts in total on an Alto Saxophoe. From up to down, the first part is the Mouthpiece, which is the black part that you put into your mouth. On a mouthpiece, there's a metal piece, which is called Ligature is used to hold the reed in place. Move down, there is another separate piece called Neck, which is the small golden-colour, curved metal that connects with the mouthpiece with the body. And the Body, which is the biggest piece with keys on it for you to play.