The animal most useful on difficult terrains is

Options

A. mule
B. yak
C. camel
D. elephant

Answer

**Step-by-Step Solution:**

1. **Understanding Difficult Terrain**:
- Define what is meant by "difficult terrain". This includes areas such as mountains, deserts, and forests where transportation can be challenging due to the landscape.

2. **Identifying Suitable Animals**:
- Consider animals that are known for their ability to navigate these difficult terrains. Common examples include mules, yaks, camels, and elephants.

3. **Evaluating Each Animal**:
- **Mule**: Known for its strength and ability to carry loads over rough terrains, making it a suitable choice for mountainous and rugged areas.
- **Yak**: Primarily used in high-altitude regions but not as versatile as mules for various terrains.
- **Camel**: Specifically adapted for desert environments; not suitable for mountainous or forested areas.
- **Elephant**: While strong and capable of carrying heavy loads, they are not typically used in deserts or mountains.

4. **Conclusion**:
- After evaluating the options, the mule stands out as the most useful animal for navigating difficult terrains due to its adaptability and strength.

5. **Final Answer**:
- The animal most useful on difficult terrains is the **mule**.

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