Which of the following is why the skin becomes looser and why muscle mass decreases during young adulthood and beyond?

a. there is an increase in white blood cells
b. there is an increase in the production of vitamin D
c. there is a substantial decrease in iron
d. there is a decrease in human growth hormones

Answer: D

Psychology

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Vella has amusia and, therefore, cannot hear.

Answer the following statement true (T) or false (F)

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