Name the bones which form base of the skull.

Explanation

### Step-by-Step Solution:

1. **Understanding the Base of the Skull**: The base of the skull is also referred to as the cranial base or cranial floor. It is the most inferior part of the skull and plays a crucial role in supporting the brain.

2. **Identifying the Bones**: The base of the skull is composed of five specific bones. These bones are essential for the structural integrity of the skull and protect the brain.

3. **Listing the Bones**:
- **Ethmoid Bone**: This bone is located at the roof of the nasal cavity and contributes to the formation of the orbits.
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