Fact 1: Fire converts chemical energy into light and heat energy.

Fact 2: Fires are large uncontrolled flames.

Given the two facts above, answer the question "What converts chemical energy into light and heat energy?" with the following options: 
- starfish
 - warmth
 - a flame
 - trees
 - cigarettes
 - an object
 - sunlight
 - engines


 

   a flame      