Question

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

Answer 1

Air is blown around the coal or wood to burn it as we know that oxygen is a supporter of fire and is combistible, therefore, when we blow air, the coal or wood glows and catches fire due to supply of enough oxygen that able to make it catch fire

Answer 2

because of fire because the where there is a heat all molecules of cool air of oxygen blown around it