Answer:
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.
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The crystals that form in slowly cooling magma are 'large rocks'.
I think that is the answer, not 100% sure!
What video ? Could you provide the link I am confused
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