You are presented with the question "what is the element that increases the oxygen near the fire?" and the following answer choices: 
- gas
 - earth
 - fire
 - CO 2
 - CO2
 - heat
 - water
 - air

Now knowing that fanning a fire increases the oxygen near the fire and on the other hand, air is the element that fans the flames of fire, choose the best answer.


 

        air 