Acar engine usually converts gasoline into motion and heat through combustion, and gasoline is made up of hydrocarbons. Given these facts, a car engine uses what to aid in combustion among the following options:
- carbon dioxide
 - electricity
 - organic molecules
 - thrust
 - hydrocarbons
 - a hydraulic system
 - kinetic energy
 - fossil fuels


 

     hydrocarbons    