Fact 1: Electric devices require electrical energy to function.

Fact 2: Electricity or electrical energy, is produced at a power plant.

Given the two facts above, answer the question "What do electric devices require to function?" with the following options: 
- grass
 - water
 - rays or beams
 - An object is seen
 - Power plants
 - wood
 - an electron lens
 - photons


 

     Power plants    