Fact 1: The vanes rotating in an electric fan causes air to move.

Fact 2: Fans move air, increasing evaporation and decreasing temperature.

Given the two facts above, answer the question "What happens when fans circulate more air?" with the following options: 
- the production of heat
 - prevent heat loss
 - rapid expansion
 - decrease in temperature
 - it flows to a lower level
 - heat produced
 - A transportation fuel
 - depress neuronal excitability


 

    decrease in temperature     