Hi, The answer should be letter A, since bone growth is the only action where complex molecules are constructed from smaller units. The other three actions are examples of catabolism instead.
The process of anabolism occurs from the transformation of simple molecules into complex molecules, and there is an energy consumption for these metabolic reactions to happen.
This process involves various hormones such as estrogen, testosterone and growth hormone (GH).
The anabolism provoked can be stimulated by two factors: physical exercise of resistance and strength (such as bodybuilding) and balanced diet rich in protein (which can be animal or vegetable). It is a constructive metabolic process that occurs in moments of rest, ie when there is no requirement for muscle effort (rest).
Suzie had blood cancer which stiffened her body until she became paralyzed, we can now prevent this by taking healthy blood and filtering out the the cancer in the blood.