Fact 1: Fanning a fire increases the oxygen near the fire.

Fact 2: Fire needs oxygen to continue burning.

Given the two facts above, answer the question "What keeps a fire burning?" with the following options: 
- energy
 - heat
 - Covering it with dirt
 - sun's heat
 - Removing fuel
 - power
 - fanning
 - Dousing it with water


 

       fanning  