What is the action of saliva on food?

Explanation

### Step-by-Step Solution:

1. **Introduction to Digestion**: The process of digestion begins in the mouth, where food is first taken in. Digestion is the conversion of complex food substances into simpler forms that the body can absorb.

2. **Role of Saliva**: Saliva plays a crucial role in initiating the digestion process. It is secreted by salivary glands located in the mouth.

3. **Moistening Food**: One of the primary actions of saliva is to moisten the food. This makes it easier to swallow, facilitating the movement of food down the esophagus.

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