You are presented with the question "What requires a lot of electricity?" and the following answer choices: 
- riding a bicycle
 - An emergency lighting source.
 - repair cells in the human body
 - sleeping on the floor
 - visiting a dam
 - Something that take eight minutes to travel to the Earth
 - Heating a metal filament.
 - keeping food fresh for long periods of time

Now knowing that arefrigerator is used for keeping food fresh for a long period of time and refrigerators are major users of electricity, choose the best answer.


 

        keeping food fresh for long periods of time 