Here's why:

* Rapid reaction with oxygen: Combustion involves a chemical reaction where a substance combines with oxygen, often at a very fast rate.

* Heat and light production: This rapid reaction releases energy in the form of heat and light, which is why we see flames.

Examples of combustion:

* Burning wood

* Burning natural gas

* Explosions

* The burning of fuels in engines

Let me know if you'd like to explore any of these examples further!