What level of biological organization would a particle of calcium be?

b

is correct hope this   also i learnd this in middle school

that is true   : ) hope this you

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.