You are presented with the question "What do yard lamps use to convert electricity to light? " and the following answer choices: 
- heat energy
 - energy
 - Solar energy
 - transference
 - heat
 - filament
 - tube
 - metal

Now knowing that an incandescent light bulb converts electricity into light by sending electricity through a filament and most of the yard lamps are incandescent, choose the best answer.


 

      filament   