By eating plants and other animals, because they obtain their carbon from food.
Explanation: the movement of organelles and other substances within cells. Endoplasmic reticulum
When pieces of the granite get broken off and carried to a new place by weathering and erosion, the pieces can get deposited in the bottom of a lake or sea. Over time the sediments get compacted and cemented together to become sedimentary rock. Sandstone, limestone, and conglomerate can form this way.
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