Fact 1: Electric devices require electrical energy to function.

Fact 2: Electricity is a kinetic energy.

Given the two facts above, answer the question "Devices require  to function" with the following options: 
- A kernel
 - hydration
 - an electron lens
 - hydrogen and oxygen
 - heating liquids
 - a hydraulic system
 - kinetic energy
 - Something to move


 

       kinetic energy  