Fact 1: Friction causes an object to lose energy.

Fact 2: Objects become confusing, such as toasters, bathtubs, cars and forks.

Given the two facts above, answer the question "what causes a car to lose energy?" with the following options: 
- Temperature
 - gas
 - slipperiness
 - friction
 - heat
 - lack of resistance
 - Dehydration
 - wind


 

    friction     