You are presented with the quiz "What happens when fans circulate more air?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "the vanes rotating in an electric fan causes air to move" and "fans move air, increasing evaporation and decreasing temperature". So, what's the best answer to the question?
Options:
i. the production of heat
ii. prevent heat loss
iii. rapid expansion
iv. decrease in temperature
v. it flows to a lower level
vi. heat produced
vii. A transportation fuel
viii. depress neuronal excitability
iv.