Fanning a fire increases the oxygen near the fire.
Fire needs oxygen to continue burning.
Fanning a fire allows it to continue burning.
What does fanning a fire do?
Options:
  * it keeps an organism warm
  * Puts the fire out
  * Makes the fire colder
  * heat is produced
  * Allow it to continue to burn
  * lowered energy cost
  * Makes it blue instead of red
  * converting electricity to heat