_________ helps in the rise of bread or dosa dough.

Explanation

**Step-by-Step Solution:**

1. **Identify the Process Involved**: The question asks about what helps in the rise of bread or dosa dough. The key process involved in this rise is fermentation.

2. **Understand Fermentation**: Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol in the absence of oxygen. This process is known as anaerobic respiration.

3. **Role of Yeast**: In the context of bread and dosa, yeast is the microorganism responsible for fermentation. When yeast cells grow and multiply, they consume sugars present in the dough.

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