Explain the breathing process in terms of pressure and volume changes.

Your diaphragm goes up (decreasing the amount of volume your lungs take) increasing pressure. Then, your lungs have higher air pressure than the atmosphere around you. The carbon dioxide diffuses from your lungs as you exhale. Then, your lungs are empty. When you inhale, your diaphragm lowers, decreasing the pressure. The air diffuses (having a higher pressure than your lungs) into your lungs.

-- derived from Boyle's law (gas diffuses)

There are  advantages  to being  multicellular  rather than unicellular. these include allowing: the  organism  to be larger.

Answer:

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.