Question

why is air blown around the coal or wood to burn it?​

Answer 1

Explanation:

Oxygen is necessary for combustion. Blowing out a candle makes the candle goes out. Because in candle the flame is due to burning of vapoutized wax. When we blow the candle the vapourized wax is removed from the heat source and the candle flame goes out. Where as in the case of wood blowing on glowing wood or charcoal will make it burn faster. When you blow the fuel cannot move away. Here while blowing your adding air to the fuel so it catches fire easily

Answer 2

To give it oxygen and oxygen is necessary for combustion.