Fact 1: Using a gasoline engine requires burning gasoline.

Fact 2: When the fuel is ignited, it burns with oxygen.

Given the two facts above, answer the question "If you want to use a gasoline engine, what must you do with the gasoline?" with the following options: 
- drain the gasoline
 - wash the gasoline
 - cool down the gasoline
 - move to different locations
 - adding heat
 - ignite the gasoline
 - vaporization
 - evaporation


 

      ignite the gasoline   