Tropical rain forests cover a small part of the planet yet they contain more species of plants and animals than all other biomes combined

True. if it is a true/false question the answer is True.

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.

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google