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.
</span>
Put on the gloves should be the first step
The answer is...
B) To ensure that you are constantly engaging your body in a way that improves its function
Usually you want your financial future to look amazing because you dont want to sit around broke and being a ward of the state do you?