Fact 1: Operating an automobile usually requires fossil fuels.

Fact 2: Fossil Fuels Fuels that are formed in the earth from plant or animal remains.

Given the two facts above, answer the question "What does operating an automobile usually require?" with the following options: 
- bus
 - bicycle
 - Animal remains
 - hydrogen and oxygen
 - energy usage
 - ramp
 - Time and energy
 - solid, liquid, gas


 

   Animal remains      