Which non-metal is essential for our life and all living beings inhale it during breathing?

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks for a non-metal that is essential for life and is inhaled by all living beings during breathing.

2. **Understand the Role of Non-Metals**: Non-metals are elements that typically lack the characteristics of metals. They can be gases, liquids, or solids and are crucial for various biological processes.

3. **Recall the Process of Breathing**: Breathing involves inhaling air, which contains various gases. The primary gas that is essential for respiration in living organisms is what we need to identify.

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