Fact 1: Electric devices require electrical energy to function.

Fact 2: Examples of such devices are PDAs, phones, and pagers.

Given the two facts above, answer the question "What requires electrical energy to function?" with the following options: 
- lemons
 - motors
 - LEDs
 - buses
 - rocks
 - hats
 - Cars
 - PDAs


 

        PDAs 