You are presented with the question "What does a light bulb require to produce light?" and the following answer choices: 
- sunlight
 - adding heat
 - darkness
 - motivation
 - sun's heat
 - fear
 - an electron lens
 - Power plant

Now knowing that alight bulb requires electrical energy to produce light and electricity or electrical energy, is produced at a power plant, choose the best answer.


 

        Power plant 