State whether the following statements are true or false :
Tooth decay is caused by the presence of a base.

Explanation

To determine whether the statement "Tooth decay is caused by the presence of a base" is true or false, we can analyze the factors that contribute to tooth decay.

### Step-by-Step Solution:

1. **Understanding Tooth Decay**: Tooth decay is a process that leads to the destruction of tooth enamel and the formation of cavities. It is important to identify what causes this process.

2. **Role of Bacteria**: In the mouth, there are bacteria that feed on sugars and carbohydrates from food. When these bacteria metabolize sugar, they produce acids as a byproduct.

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