Steller's sea cow from Russia , described by George Wilhelm steller become extinct due to

Options

A. Habitat destruction
B. Over - exploitation
C. Bird - flu virus infection
D. Pollution

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the extinction of Steller's sea cow, a species described by George Wilhelm Steller. We need to identify the primary reason for its extinction.

2. **Identifying Possible Causes**: The video transcript mentions several factors that can lead to species extinction, including:
- Habitat destruction
- Overexploitation
- Bird flu
- Virus infection
- Pollution

3. **Analyzing Each Cause**:
- **Habitat Destruction**: This refers to the loss of natural environments where species live. While it is a significant cause of extinction, it is not the primary reason for Steller's sea cow.
- **Overexploitation**: This occurs when humans excessively harvest a species beyond its capacity to reproduce. Steller's sea cow was hunted extensively for its meat and fat, leading to its rapid decline.
- **Bird Flu and Virus Infection**: These are diseases that can affect wildlife but are not directly linked to the extinction of Steller's sea cow.
- **Pollution**: While pollution can harm marine life, it was not the main factor in the extinction of this species.

4. **Conclusion**: The primary reason for the extinction of Steller's sea cow is overexploitation. This species was heavily hunted by humans for its resources, leading to its extinction.

5. **Final Answer**: Therefore, the correct answer is **overexploitation**.

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