Fact 1: Fanning a fire increases the oxygen near the fire. Fact 2: Fire needs oxygen to continue burning. Given the two facts above, what does fanning a fire do?
Choices:
i. it keeps an organism warm
ii. Puts the fire out
iii. Makes the fire colder
iv. heat is produced
v. Allow it to continue to burn
vi. lowered energy cost
vii. Makes it blue instead of red
viii. converting electricity to heat
Answer:
v.