Find the odd example

Options

A. Sea fan
B. Sea lily
C. sea urchin
D. sea cucumber

Answer

To solve the question of finding the odd example among the given options, we will analyze each option based on their classification in terms of phylum and class.

### Step-by-Step Solution:

1. **Identify the Options:**
- Option A: Sea Fan
- Option B: Sea Lily
- Option C: Sea Urchin
- Option D: Sea Cucumber

2. **Classify Each Option:**
- **Option A: Sea Fan**
- Class: Gorgonia
- Phylum: Cnidaria
- **Option B: Sea Lily**
- Class: Antedon
- Phylum: Echinodermata
- **Option C: Sea Urchin**
- Class: Echinoidea
- Phylum: Echinodermata
- **Option D: Sea Cucumber**
- Class: Holothuroidea
- Phylum: Echinodermata

3. **Compare the Phylum of Each Option:**
- Sea Fan (Cnidaria) - **Phylum: Cnidaria**
- Sea Lily (Echinodermata) - **Phylum: Echinodermata**
- Sea Urchin (Echinodermata) - **Phylum: Echinodermata**
- Sea Cucumber (Echinodermata) - **Phylum: Echinodermata**

4. **Identify the Odd One Out:**
- The Sea Fan is the only organism that belongs to the phylum Cnidaria, while the Sea Lily, Sea Urchin, and Sea Cucumber all belong to the phylum Echinodermata.

5. **Conclusion:**
- Therefore, the odd example is **Option A: Sea Fan**.

### Final Answer:
The odd example is **Option A: Sea Fan**.

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