Fact 1: Absorbing energy causes objects to heat.

Fact 2: Every car is in the group vehicles and in the group ground objects .

Given the two facts above, answer the question "Absorbing what causes cars to heat?" with the following options: 
- cool
 - Pollution
 - sunlight
 - energy
 - oxygen
 - shade
 - ice
 - Energy.


 

    energy     