How do you classify a nail care essential? A. It is classified according to its quality.
B. It is classified according to its quantity.
C. It is classified according to its use.
D. It is classified according to its availability

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.