You are told by your science teacher to set up an aquarium as a mini ecosystem. Which of the following are needed in setting up your aquarium A. Fish and water only
B. Water, sand and light only
C. Fish, snails, and plants only
D. Water, sand, soil and sunlight only

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.

it's c.us forest service

the answer

b.) bowling ball