The most common supporter of combustion around us is _______.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Combustion**: The term "combustion" refers to the process of burning. It involves a chemical reaction where a combustible substance reacts with a supporter of combustion, typically producing heat and light.

2. **Identifying the Supporter of Combustion**: In order for combustion to occur, a combustible substance must be present along with a supporter of combustion. The most common supporter of combustion in our environment is air.

3. **Composition of Air**: Air is primarily composed of nitrogen and oxygen, with oxygen being the key component that supports combustion. When a combustible substance burns, it reacts with oxygen in the air.

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