In which food would you find lactic acid bacteria? Mention some of their useful applications.

Explanation

**Step-by-Step Solution:**

1. **Identification of Food Sources:**
- Lactic Acid Bacteria (LAB) are commonly found in milk. They thrive in dairy products and are essential for the fermentation process.

2. **Fermentation Process:**
- When LAB are added to milk, they multiply and produce lactic acid. This acidification leads to the coagulation of milk proteins, resulting in the formation of curd. This is a primary application of LAB in food processing.

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