Which one shows the regeneration ?

Options

A. Planaria
B. hydra
C. strafish
D. All of the above

Answer

### Step-by-Step Solution:

1. **Understanding Regeneration**: Regeneration is the biological process where organisms can restore lost or damaged tissues. This process can occur in various organisms, particularly invertebrates and some vertebrates.

2. **Identifying Organisms**: The question asks which organism shows regeneration. We need to evaluate the options given.

3. **Evaluating Planaria**:
- Planaria belongs to the Phylum Platyhelminthes.
- It is well-known for its remarkable regenerative abilities. If a part of Planaria is cut off, it can regenerate the lost part effectively.

4. **Evaluating Hydra**:
- Hydra is part of the Phylum Cnidaria.
- This organism also exhibits regeneration. It can regrow parts of its body if they are damaged or removed.

5. **Evaluating Starfish**:
- Starfish belongs to the Phylum Echinodermata.
- Starfish are also capable of regeneration. They can regenerate lost arms, and in some cases, an entire new starfish can grow from a single arm.

6. **Conclusion**: Since all three organisms (Planaria, Hydra, and Starfish) demonstrate the ability to regenerate, the correct answer to the question is "all of the above".

### Final Answer:
All of the above (Planaria, Hydra, and Starfish) show regeneration.

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