Fact 1: Operating an automobile usually requires fossil fuels.

Fact 2: Fossil fuels are a finite resource.

Given the two facts above, answer the question "What powers most automobiles? " with the following options: 
- Sunlight.
 - A finite resource.
 - Natural gas.
 - an engine
 - energy of moving objects
 - Water
 - a hydraulic system
 - transportation technology


 

  A finite resource.       