It helps remove wastes. thus why we pee.
D is the correct answer to this question
The answer is false. Proteins have about 9 jobs and their biggest task is building tissues and muscles. They also do things such as hormone and enzyme production, immune function, provide energy, cause biochemical reactions, relays as a messenger in the body, etc.
Regularly scheduled exercise can do all of those depending on what /how you do it and who you are.
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I believe that they all effect the production of hormones
