Name some food items that are prepared by using yeast.

Explanation

### Step-by-Step Solution:

1. **Understanding Yeast**: Yeast is a single-celled microorganism that plays a crucial role in food preparation through fermentation.

2. **Anaerobic Respiration**: Yeast performs anaerobic respiration, which means it can produce energy without oxygen. This process generates carbon dioxide (CO2) as a byproduct.

3. **Food Items Prepared Using Yeast**:
- **Bread**: Yeast is used in bread-making, where it ferments the dough, causing it to rise due to the CO2 produced.
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