Sea Cucumber belongs to class

Options

A. Echinoidea
B. Holothuroidea
C. Asteroidea
D. Ophiothrix.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question asks about the classification of the Sea Cucumber.

2. **Understand the Options**: The options provided are:
- Echinoidea
- Holothuroidea
- Asteroidea
- Ophiuroidea

3. **Analyze Each Class**:
- **Echinoidea**: This class includes sea urchins and sand dollars, which are typically globular in shape and have spines.
- **Holothuroidea**: This class includes sea cucumbers, which are elongated and cylindrical in shape, and notably lack arms.
- **Asteroidea**: This class consists of starfish, characterized by their star-shaped bodies with five or more arms.
- **Ophiuroidea**: This class includes brittle stars, which have long, slender arms and are distinct from sea cucumbers.

4. **Match Characteristics**: Sea cucumbers are elongated and cylindrical, fitting the description of Holothuroidea, while the other classes do not match this description.

5. **Conclusion**: Based on the analysis, the Sea Cucumber belongs to the class **Holothuroidea**.

**Final Answer**: Sea Cucumber belongs to the class **Holothuroidea**.

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