Name three categories of threatened species.

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for three categories of threatened species, not specific species themselves. This means we need to focus on classifications.

2. **Identifying the Categories**:
- The first category is **Endangered**.
- **Definition**: Endangered species are those that are at a high risk of extinction in the wild. They are facing a significant decline in population and habitat.

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