Acar engine usually converts gasoline into motion and heat through combustion, and an internal combustion engine burns a mixture of fuel and air. Given these facts, how does a car engine create movement among the following options:
- Oil
 - Added pressure
 - electricity
 - activation energy
 - contracting
 - a hydraulic system
 - Burning water and salt
 - Burning fuel and air


 

        Burning fuel and air 