What is the role of radula in molluscs?

Explanation

### Step-by-Step Solution:

1. **Definition of Radula**: The radula is a specialized feeding structure found in molluscs. It is often described as a rasping organ.

2. **Function of Radula**: The primary role of the radula is to scrape and scratch food. This allows molluscs to effectively consume a variety of food sources, including algae and other organic materials.

3. **Structure of Radula**: The radula is composed of rows of tiny teeth. These teeth are crucial for the scraping action and are continuously replaced as they wear down during use.

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