How are cavities in teeth formed?

Explanation

**Step-by-Step Solution:**

1. **Understanding Cavities**: Cavities, also known as dental caries, are holes or decayed areas in the teeth that can lead to further dental issues if not treated.

2. **Role of Acids**: Cavities form when acids in the mouth begin to erode the hard outer layer of the tooth, known as enamel. These acids can come from the breakdown of sugars by bacteria present in the mouth.

3. **Bacterial Activity**: When we consume sugary foods, bacteria in the mouth feed on these sugars and produce acids as a byproduct. Over time, these acids can weaken and damage the enamel.

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