An unidentified plant produces spores, has many cells, but does not have true leaves. What plant is it? A. liverwort
В. fern
C. gymnosperm
D. angiosperm

the actual answer was 160934

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.