A snake has no ear but it perceives sound through

Options

A. air
B. snout
C. skin
D. tongue

Answer

### Step-by-Step Solution:

1. **Understanding the Anatomy of Snakes**:
- Snakes do not have external ear openings, which are typically found in many other animals. This means they lack the visible outer ear structure.

2. **Inner Ear Development**:
- Despite the absence of external ears, snakes possess a well-developed inner ear. This includes structures like the cochlea, which are responsible for processing sound vibrations.

3. **Mechanism of Sound Perception**:
- Snakes perceive sound primarily through vibrations. They have a unique adaptation where they can detect these vibrations using their jaw.

4. **Jaw as a Sensory Organ**:
- When a snake rests its jaw on the ground or any surface, it can pick up vibrations from that surface. This allows the snake to sense movements and sounds in its environment, which is crucial for locating prey.

5. **Stereo Hearing**:
- The process by which snakes detect these vibrations through their jaw is referred to as "stereo hearing." This adaptation helps them to effectively hunt and navigate their surroundings.

6. **Conclusion**:
- Based on the above information, the correct answer to the question of how snakes perceive sound is through their **skin**, specifically the jaw resting on surfaces to detect vibrations.

### Final Answer:
A snake perceives sound through its **skin** (specifically, the vibrations detected by its jaw).

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