You are presented with the question "Differential heating of air can be harnessed for what?" and the following answer choices: 
- Animal survival
 - direct energy
 - reducing acid rain
 - Movement of an air mass
 - heat energy
 - running and lifting
 - electricity production
 - faster movement

Now knowing that wind is used for producing electricity and differential heating of air produces wind, choose the best answer.


 

       electricity production  