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Which of the following statements is the best description of digestion?
a. Mechanical digestion is the physical breakdown of food, and chemical digestion is the chemical break-
down of food molecules.
b. Chemical digestion is the physical breakdown of food, and mechanical digestion is the chemical break-
down of food molecules.
c. Chemical digestion is the physical breakdown of food, and mechanical digestion is the mechanical
breakdown of food molecules.
d. Mechanical digestion occurs in your mouth, and chemical digestion occurs in your stomach.



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