Answer: A. burning of fossil fuels
Explanation:
The burning of the fossil fuels liberates sulfur dioxide and nitrogen oxide into the atmosphere. In the atmosphere these oxides get mixed with the water vapors which lead to the formation of sulfuric acid and nitric acid in the atmosphere. These acids condense in the form of rain called as acid rain. The acid rain pollute the water, deteriorates the surface of building materials and makes the soil acidic.
