Which of these is an endemic species?

Options

A. Lemur
B. Tiger
C. Squirrel
D. Elephant

Answer

### Step-by-Step Solution

1. **Understanding Endemic Species**:
- An endemic species is one that is native to a specific geographic area and is not naturally found anywhere else.

2. **Identifying the Options**:
- The question presents four options: Lemur, Tiger, Squirrel, and Elephant.

3. **Analyzing Each Option**:
- **Lemur**: This species is found only in Madagascar. It cannot survive outside this habitat, making it an endemic species of Madagascar.
- **Tiger**: Tigers are found in various parts of the world, including India, China, and Southeast Asia. Therefore, they are not endemic to any one location.
- **Squirrel**: Squirrels are widespread and can be found in many different regions around the world, so they are not endemic.
- **Elephant**: Elephants are also found in various parts of Asia and Africa, making them non-endemic.

4. **Conclusion**:
- Based on the analysis, the only species that qualifies as an endemic species from the given options is the **Lemur**, as it is exclusively found in Madagascar.

### Final Answer:
The endemic species among the options is **Lemur**.