Which one of the following is a CORRECT statement regarding metabolism?

A) Few living organisms require raw materials and a constant source of energy.
B) Plants get the raw materials they need for life processes entirely from the air.
C) Cells maintain life through the breakdown of molecules and energy by chemical and physical processes.
D) Cells do not require energy to change molecules from one form to another.
E) Animals use energy obtained directly from the sun and chemicals obtained from plants, other animals, air, and water.