Fanning a fire increases the oxygen near the fire.
Fire is a combustion reaction.
Fanning a combustion reaction increases the oxygen near it.
What increases the oxygen near a combustion reaction?

[a] watering it
[b] heat energy
[c] kinetic energy
[d] using an extinguisher on it
[e] smothering it
[f] energy barrier
[g] fanning it
[h] evaporation