Here's why:
* Food is composed of chemical compounds: These compounds, like carbohydrates, fats, and proteins, store energy in their chemical bonds.
* Breaking those bonds releases energy: When an organism digests food, it breaks down these chemical bonds, releasing the stored energy.
* This energy is used for various processes: The organism then uses this released chemical energy for essential life processes like movement, growth, repair, and reproduction.
In short: Eating food provides organisms with chemical energy, which is the energy stored in the chemical bonds of food molecules.