The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.
B. The layering of the rock.
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The answer is C, it helps the roots to down. Think of gravity, it keeps us in place
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Mussels are one of the two food sources to octopus
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Answer:
Alveoli are tiny balloon-shaped structures. They sit at the ends of the branches of your respiratory tree.
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