A file-like rasping organ for feeding is observed in :

Options

A. Porifera
B. Cnidaria
C. Ctenophora
D. Mollusca

Answer

To solve the question regarding the file-like rasping organ for feeding, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about a specific organ used for feeding that is described as file-like and rasping.

2. **Evaluate the Options**:
- **Option 1: Porifera**: These are sponges, which do not have a rasping organ. They filter feed through their porous bodies.
- **Option 2: Cnidaria**: This group includes jellyfish and corals. They possess cnidocytes for stinging but do not have a rasping organ.
- **Option 3: Annelida**: This option is not mentioned in the video, but annelids have a different feeding mechanism, typically involving a pharynx.
- **Option 4: Mollusca**: This group includes snails and slugs, which possess a unique feeding organ known as the radula.

3. **Identify the Correct Answer**: The radula is the file-like rasping organ used by mollusks for feeding, scraping food off surfaces. Therefore, the correct answer is **Option 4: Mollusca**.

### Final Answer:
The file-like rasping organ for feeding is observed in **Mollusca**.

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