Yeast is used to manufacture alcoholic beverages like wine and beer. It is used in the production of breads. It is also used as a nutrient supplement for human beings. Which of the following processes uses yeast to make wines and breads?

Options

A. Photosynthesis
B. Fermentation
C. Decomposition
D. Chemosynthesis

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Yeast**: Yeast is a microorganism that plays a crucial role in various processes, particularly in the production of alcoholic beverages like wine and beer, as well as in baking bread.

2. **Identifying the Process**: The question asks for the specific process that uses yeast to produce wine and bread. The key to this is understanding how yeast functions in these processes.

3. **Fermentation Process**: The process by which yeast converts sugars (carbohydrates) into alcohol (ethanol) and carbon dioxide in the absence of oxygen is known as fermentation. This is a form of anaerobic respiration.

4. **Production of Alcohol and Carbon Dioxide**: During fermentation, yeast consumes sugar and produces ethanol, which is the alcohol found in wine and beer, and carbon dioxide, which causes bread to rise and gives it a spongy texture.

5. **Conclusion**: Therefore, the process that uses yeast to make wines and breads is called fermentation.

**Final Answer**: The correct answer is **fermentation**.

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