Most of the endangered species are victims of

Options

A. Acid rain
B. Competition with introduced species
C. Habitat destruction
D. Over-hunting.

Answer

### Step-by-Step Solution:

1. **Understanding Endangered Species**:
- Endangered species are those species that are at risk of extinction. This means that their population has decreased significantly, and they are in danger of disappearing completely.

2. **Identifying Causes of Endangerment**:
- There are several factors that can lead to a species becoming endangered. The question provides four options:
- Acid rain
- Competition with introduced species
- Habitat destruction
- Overhunting

3. **Analyzing Each Option**:
- **Acid Rain**: While acid rain can harm ecosystems, it is not a direct cause of endangerment for most species.
- **Competition with Introduced Species**: This can impact native species, but it is not the primary cause of endangerment for most species.
- **Habitat Destruction**: This is a significant factor leading to the endangerment of many species. Urbanization and industrialization often lead to the destruction of natural habitats, which is critical for the survival of many species.
- **Overhunting**: While overhunting can lead to the decline of certain species, it is not as widespread a cause of endangerment as habitat destruction.

4. **Conclusion**:
- After analyzing the options, habitat destruction emerges as the most significant factor contributing to the endangerment of species. Therefore, the correct answer is **habitat destruction**.

### Final Answer:
Most of the endangered species are victims of **habitat destruction**.

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