Biologically speaking, metabolism is the sum of all chemical processes within the body, though it is often referred to as those which involve digestion and cellular respiration.
That said, the answer here should be B: <span>The process by which the body gets energy from food.
For the record, A is the definition of puberty, C is likely the definition of hormones, and D is the definition of adolescence.
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➷ It secretes bile which helps in the digestion of fats.
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It seems like it's long term goals.
