Final answer:
The cell function that describes the chemical reactions inside the cell that break down the food we eat into macromolecules is digestion.
Step-by-step explanation:
The cell function that describes the chemical reactions inside the cell that break down the food we eat into macromolecules is C. Digestion.
When we consume food, our digestive system breaks down the food into smaller molecules such as carbohydrates, lipids, and proteins. These catabolic reactions occur in the stomach and intestines and involve the action of digestive enzymes. The smaller molecules, or macromolecules, are then used by the body to provide energy and build new cells.