Process of regeneration is seen in

Options

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

Explanation

**Step-by-Step Solution:**

1. **Understanding Regeneration**: Regeneration is a natural process that allows organisms to replace or restore damaged or missing cells, tissues, organs, or even entire body parts. This process is crucial for survival and adaptation in various species.

2. **Identifying Organisms**: The question lists several organisms: fungi, yeast, algae, and planaria. We need to determine which of these organisms exhibit the process of regeneration.

3. **Analyzing Each Organism**:
- **Fungi**: Generally do not regenerate in the same way as animals or plants. They reproduce through spores and can form new mycelium, but this is not considered regeneration.
- **Yeast**: Yeast reproduces asexually through budding, which is a form of reproduction rather than regeneration.
- **Algae**: Some algae can regenerate, but they do not have the same regenerative capabilities as certain multicellular organisms.
- **Planaria**: Planaria are flatworms known for their remarkable regenerative abilities. They can be cut into pieces, and each piece can regenerate into a complete organism.

4. **Conclusion**: Based on the analysis, the process of regeneration is prominently seen in planaria. Therefore, the correct answer to the question is planaria.

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

---