Survival due to geographical is best exemplified by mammalian fauna of

Options

A. Oriental region
B. Ethiopean region
C. Palaearctic region
D. Australian region

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks for an example of mammalian fauna that demonstrates survival due to geographical factors.

2. **Identifying the Options**: The options provided are:
- 1st: Oriental region
- 2nd: Ethiopian region
- 3rd: Paleo-Arctic region
- 4th: Australian region

3. **Analyzing Each Region**:
- **Oriental Region**: This region includes Eastern Iran, India, Sri Lanka, and Southeast Asia. It has diverse habitats, including tropical rainforests and dry areas.
- **Ethiopian Region**: Known for its unique fauna, but less emphasis on geographical survival compared to the Oriental region.
- **Paleo-Arctic Region**: Characterized by cold climates, but not as diverse in mammalian fauna.
- **Australian Region**: Known for its unique species, but again, it does not best exemplify geographical survival in the same way as the Oriental region.

4. **Choosing the Correct Option**: The Oriental region is the best example of survival due to geographical factors. The fauna here is adapted to various habitats, such as dry, desert-like areas and tropical rainforests, demonstrating how geography influences the distribution and survival of mammalian species.

5. **Conclusion**: Therefore, the correct answer is the **Oriental region**.

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