Fact 1: Some light bulbs convert electricity into light and heat energy.

Fact 2: Light source is an ultra-bright, unbreakable LED Bulb.

Given the two facts above, answer the question "What convert electricity into light and heat energy?" with the following options: 
- cats
 - copper
 - LEDs
 - trains
 - Cars
 - cells
 - energy
 - buses


 

   LEDs      