The layer of air present around the ear is called :

Options

A. Smog
B. Pollution
C. Atmosphere
D. None of these

Answer

To solve the question "The layer of air present around the ear is called:", we need to clarify that the question is actually referring to the layer of air around the Earth, not the ear. Here's a step-by-step solution:

### Step-by-Step Solution:

1. **Identify the Question**: The question asks about the layer of air surrounding a specific entity. Initially, it mentions "ear," but we need to interpret it correctly as referring to the Earth.

2. **Understand the Concept**: The layer of air surrounding the Earth is essential for life. It provides oxygen for breathing, protects from harmful solar radiation, and helps regulate temperature.

3. **Recall Relevant Terminology**: The scientific term for the layer of air around the Earth is commonly known as the "atmosphere."

4. **Eliminate Incorrect Options**: The question may provide multiple-choice answers. We can eliminate options that do not relate to the layer of air, such as "smog" or "pollution," as these refer to specific conditions or contaminants in the air rather than the air layer itself.

5. **Conclude with the Correct Answer**: Based on the understanding that the layer of air surrounding the Earth is called the atmosphere, we conclude that the correct answer is "atmosphere."

### Final Answer:
The layer of air present around the Earth is called the **atmosphere**.

---