Fact 1: An automobile engine transforms chemical energy into mechanical energy.

Fact 2: Gasoline is a mix of hundreds of chemicals.

Given the two facts above, answer the question "What do cars use for energy?" with the following options: 
- engines
 - Energy.
 - heat
 - Gasoline
 - energy
 - fossil fuels
 - coal
 - photons


 

    Gasoline     