What is the role of baker's yeast in bread making?

Explanation

**Step-by-Step Solution:**

1. **Introduction to Baker's Yeast**: Baker's yeast, scientifically known as Saccharomyces cerevisiae, is a type of yeast commonly used in baking and fermentation processes.

2. **Leavening Agent**: The primary role of baker's yeast in bread making is to act as a leavening agent. This means it helps the bread rise by producing gas.

3. **Fermentation Process**: When baker's yeast is added to the dough, it ferments the sugars present in the flour. This fermentation process occurs in the absence of oxygen (anaerobic conditions).

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