The breaking apart of foods into smaller and smaller units is called
a. digestion
b. absorption
c. metabolism
d. molecular function

The correct option is: a. digestion

Explanation:

Digestion is the process by which the large complex molecules of food are broken down into small molecules. The two types of digestion in a human body are: Mechanical digestion and Chemical digestion.

Mechanical digestion includes physical breakdown of complex food molecules into simpler molecules.

Whereas, chemical digestion is a process by which the digestive enzymes help in the breakdown of complex food molecules into simpler molecules.

the answer is learned