Process of regeneration is seen in

Options

A. Fungi
B. Yeasts
C. Algae
D. Planaria

Answer

### Step-by-Step Solution:

1. **Understanding Regeneration**:
- Regeneration is defined as the ability of an organism to replace lost or damaged body parts. This process allows organisms to heal and restore themselves after injury.

2. **Examples of Regeneration**:
- Common examples include:
- **Lizards**: If a lizard loses its tail, it can regenerate a new one.
- **Starfish**: If a starfish loses an arm, it can regrow the lost limb, and sometimes even regenerate a whole new starfish from a single arm.

3. **Identifying Organisms That Regenerate**:
- The question asks which organisms exhibit the process of regeneration.
- The organisms mentioned include:
- **Fungi**: Generally do not exhibit regeneration.
- **Yeast**: Also does not show regeneration.
- **Algae**: Some types can regenerate, but it is not as pronounced as in other organisms.
- **Planaria**: This is a type of flatworm that is well-known for its regenerative capabilities.

4. **Focusing on Planaria**:
- Planaria can regenerate even when cut into many pieces. Each piece can grow into a complete new organism. This remarkable ability makes Planaria a prime example of regeneration in the biological world.

5. **Conclusion**:
- Based on the examples and explanations, the organism where the process of regeneration is prominently observed is **Planaria**.

### Final Answer:
The process of regeneration is seen in **Planaria**.

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