Air is :

Options

A. Mixture
B. Compound
C. Element
D. All of these

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks what air is, providing options such as "vixen," "pound," or "element."

2. **Defining Air**: Air is the mixture of gases that surrounds the Earth. It is not a single substance but consists of various gases.

3. **Composition of Air**: The primary components of air include:
- Nitrogen: Approximately 78% of air
- Oxygen: Approximately 21% of air
- Other gases: Such as carbon dioxide (CO2), water vapor, and trace gases make up the remaining 1%.

4. **Classification of Air**: Since air contains multiple gases in varying proportions, it is classified as a mixture. More specifically, it is a homogeneous mixture because the composition is uniform throughout.

5. **Conclusion**: Based on the understanding of air and its composition, we can conclude that the correct answer is that air is a mixture.

**Final Answer**: Air is a mixture of various gases.

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