B) Proteins
Lipids and Carbohydrates only contain carbon, hydrogen, and oxygen.
Unsaturated fats are a type of monomer for lipids, meaning they as well are only made up of carbon, hydrogen, and oxygen.
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Explanation:
Water is the most abundant substance in the body. An average healthy adult is 45 to 75 percent water. Percent of water declines with age. Males have more body water than females.
It would help you know how they all work together like how the musicular system helps the digestive system during digestion
