Cheese and yogurt are the products of:

Options

A. Pasteurization
B. Distillation
C. Dehydration
D. Fermentation

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the process through which cheese and yogurt are produced.

2. **Identifying the Options**: The options provided are:
- A) Pasteurization
- B) Distillation
- C) Dehydration
- D) Fermentation

3. **Analyzing Each Option**:
- **Pasteurization**: This is a method of heating food, particularly liquids like milk, to kill harmful bacteria. It is not a process that produces cheese or yogurt but rather a preservation technique.
- **Distillation**: This technique is used to purify liquids by heating them to create vapor and then cooling the vapor to create a liquid. It is not related to the production of cheese or yogurt.
- **Dehydration**: This process involves removing water from food to prevent spoilage. While it is a preservation method, it does not produce cheese or yogurt.
- **Fermentation**: This is a metabolic process that converts sugar to acids, gases, or alcohol using microorganisms. It occurs in the absence of oxygen and is the process through which both cheese and yogurt are produced.

4. **Conclusion**: After analyzing all the options, it is clear that cheese and yogurt are produced through the process of fermentation.

5. **Final Answer**: The correct answer is **D) Fermentation**.

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