You are presented with the question "Gases from what causes precipitation where the pH is 5.7 or lower?" and the following answer choices: 
- Condensation
 - aqueous solution
 - streams
 - Pollution
 - evaporation
 - Organic compounds
 - vaporization
 - burning coal

Now knowing that gases from burning coal and oil dissolving in water in the atmosphere causes acid rain and acid rain is precipitation which pH is 5.7 or lower, choose the best answer.


 

        burning coal 