You are presented with the question "Some cars can now be powered by " and the following answer choices: 
- wind
 - Solar energy
 - fusion power plants
 - brain waves
 - gravitational waves
 - engines
 - sunlight
 - energy

Now knowing that asolar panel converts sunlight into electricity and electricity Cars that operate using electricity are the cleanest cars on the market, choose the best answer.


 

       sunlight  