You are presented with the question "What comes from burning coal and oil dissolving in water in the atmosphere?" and the following answer choices: 
- Plant growth is reduced
 - A transportation fuel
 - Generating heat
 - harmful substances
 - DNA damage and mutations
 - A compound that donates proton
 - ozone depletion
 - Mutagenic chemicals

Now knowing that gases from burning coal and oil dissolving in water in the atmosphere causes acid rain and an acid is defined as a compound which can donate a proton , choose the best answer.


 

      A compound that donates proton   