Water, vitamins, minerals, and linoleic acid are nutrients the body cannot manufacture or produce in sufficient amounts and thus are referred to as essential nutrients.
The human body needs nutrients to perform its various functions. A nutrient is a substance that enables the body to grow, survive and reproduce. These nutrients are not always synthesized by the body but are taken from the diet. The diet we eat should be balanced and have adequate amounts of nutrients like vitamins, minerals, fats, etc.
Essential nutrients are those nutrients that cannot be processed by the body and thus are required to be consumed through the diet. Vitamins, minerals, fats, proteins, water, and carbohydrates are six essential nutrients.
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It's a hard one between the last two. It would depend on the circumstances and the teen themselves. Generally speaking, teens who have parents that enforce things don't act out but on occasion some have decided to "rebel" and take an alternative route.
However, for the sake of this question, I'm going to say a teen whose girlfriend broke up with him but acts as if nothing had happened.
Contamination. The contaminate tourniquet can have germs or disease that would enter the blood being draw and give a wrong diagnosis.
Your answer would be D, "measuring the angle at which gymnasts body bends during an aerial flip." Goodluck! :)
