A) Fad diets are extremeand do not include balanced meals. They are usually hard to maintain because of there extreme restrictions. Also the weight one loses while on a fad diet is generally gained back as soon as a person stops dieting
Explanation:
total medal fat can be used to determine body mass percentage
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All living beings are made up of basic units called cells; for this reason it is said that the cell is the structural unit of living beings. In the cell, all the functions and chemical reactions necessary for life are carried out; in addition, it participates in the reproduction processes