Give examples of food preservatives.

Explanation

### Step-by-Step Solution:

**Step 1: Understand the Concept of Food Preservatives**
Food preservatives are substances added to food to prevent spoilage and extend shelf life. They can be classified into two main categories: natural and chemical preservatives.

**Step 2: Identify Natural Food Preservatives**
Natural food preservatives are those that are derived from natural sources and are generally recognized as safe. Examples include:
- **Salt**: Commonly used to inhibit microbial growth.
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