Species listed in Red Data Book are

Options

A. Vulnerable
B. Threatened
C. Endangered
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding the Red Data Book**: The Red Data Book is a comprehensive resource that lists species at risk of extinction. It categorizes species based on their conservation status.

2. **Categories of Threat**: The species in the Red Data Book are classified into various categories based on their level of threat. These categories include:
- **Vulnerable**: Species that are at risk of becoming endangered unless the circumstances threatening their survival and reproduction improve.
- **Threatened**: A broader category that includes any species that is likely to become endangered in the near future.
- **Endangered**: Species that are facing a very high risk of extinction in the wild.

3. **Identifying the Options**: The question provides four options:
- A) Vulnerable
- B) Threatened
- C) Endangered
- D) All of the above

4. **Analyzing the Options**:
- **Option A (Vulnerable)**: Correct, as vulnerable species are listed in the Red Data Book.
- **Option B (Threatened)**: Correct, as threatened species are also included.
- **Option C (Endangered)**: Correct, as endangered species are listed as well.
- **Option D (All of the above)**: Since all the previous options are correct, this option is also correct.

5. **Conclusion**: Since the Red Data Book includes species that are vulnerable, threatened, and endangered, the most comprehensive answer is option D, which states "All of the above."

**Final Answer**: D) All of the above

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