Classify the changes involved in the following processes as physical or chemical changes:
Digestion of food

Explanation

To classify the digestion of food as a physical or chemical change, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Definitions**:
- **Physical Change**: This involves changes that affect the physical properties of a substance (like shape, size, or state) but do not alter its chemical composition. Physical changes are usually temporary and reversible.
- **Chemical Change**: This involves a chemical reaction where the original substances (reactants) are transformed into new substances (products) with different properties. Chemical changes are permanent and irreversible.

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