You are presented with the question "A light bulb uses what when it converts electrical energy?" and the following answer choices: 
- SO2
 - O3
 - copper
 - nektar
 - heat
 - waves
 - tube
 - fibers

Now knowing that alight bulb converts electrical energy into light energy when it is turned on and most of the energy a light bulb uses turns into heat, choose the best answer.


 

     heat    