What common object contains oxygen and has the property of supporting combustion?

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Multiple Choice

What common object contains oxygen and has the property of supporting combustion?

Explanation:
Combustion needs a source of oxygen from the surroundings, and the everyday thing that provides that is air. Air is a mix that includes about 21% oxygen, which fuels fires and allows flames to continue burning. Water contains oxygen chemically, but it isn’t a source of oxidizer for flames and actually cools and can extinguish fires. Salt is just a stable compound and doesn’t supply oxygen to support combustion. Wood is a fuel and burns because it reacts with the oxygen in the air, not because it contains the oxygen itself. So the common object that contains oxygen and can support combustion is air.

Combustion needs a source of oxygen from the surroundings, and the everyday thing that provides that is air. Air is a mix that includes about 21% oxygen, which fuels fires and allows flames to continue burning. Water contains oxygen chemically, but it isn’t a source of oxidizer for flames and actually cools and can extinguish fires. Salt is just a stable compound and doesn’t supply oxygen to support combustion. Wood is a fuel and burns because it reacts with the oxygen in the air, not because it contains the oxygen itself. So the common object that contains oxygen and can support combustion is air.

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