Fact 1: Using a gasoline engine requires burning gasoline.

Fact 2: Gasoline and flammable liquid related burns, however, are a preventable problem.

Given the two facts above, answer the question "using an what requires burning flammable liquid" with the following options: 
- light bulb
 - engine
 - toaster
 - Decibels
 - cigars
 - barrel
 - Cooking
 - battery


 

  engine       