You are presented with the question "What type of energy generated by the bulbs is wasted?" and the following answer choices: 
- warmth
 - stored
 - motion
 - light
 - oil
 - heat
 - sugar
 - mostly

Now knowing that some light bulbs convert electricity into light and heat energy and since the purpose of a light bulb is to generate light, the heat is wasted energy, choose the best answer.


 

      heat   