Classify the algae volvox, ulva, and chlamydomonas based on their cellularity.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

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.