Abdominal Respiration
You've heard the expression "sing your heart out." Putting aside the accepted interpretation of giving your all when you sing, this expression can also be interpreted as the importance of using the body when singing.
The quality of singing depends largely on breathing and does not solely require the upper part of your body. Mastering breathing is the first step to mastering your voice. It is therefore important to identify the mechanism and understand why abdominal breathing is important for singing.