ANATOMY

Detailed explanation-1: -Metabolism (pronounced: meh-TAB-uh-liz-um) is the chemical reactions in the body’s cells that change food into energy. Our bodies need this energy to do everything from moving to thinking to growing.

Detailed explanation-2: -Humans obtain energy from three classes of fuel molecules: carbohydrates, lipids, and proteins. The potential chemical energy of these molecules is transformed into other forms, such as thermal, kinetic, and other chemical forms.

Detailed explanation-3: -Answer and Explanation: The energy used by most organisms for metabolism ultimately comes from solar energy. This solar energy is harnessed via photosynthetic organisms to produce carbon-based compounds such as glucose.