Breathing is essential to singing because when you sing the breath passes over the vocal chords and creates sound. Without breath there is no sound.
How to Breathe
If you look at a baby when they breathe you would notice that they use their stomach (diaphragm muscles). As they breathe in their stomach relaxes and pushes out to allow air into the lungs. When they breathe out the diaphragm muscles draw into the body. The problem is that we can carry stress in our bodies so we can have a shallower breath.
