The correct answer is: C. Lowering of pH of soil
Oxides of sulfur are air pollutants that are released into the atmosphere by burning fossil fuels such as coal and oil. When these pollutants are washed down by rain, they form acid rain. Acid rain can lower the pH of soil, making it more acidic and less hospitable to plants. This can lead to a decline in plant growth and a loss of biodiversity.
Option A is incorrect because depletion of fossil fuel reserves is caused by the burning of fossil fuels, not by the presence of oxides of sulfur in the atmosphere.
Option B is incorrect because eutrophication in lakes is caused by the runoff of nutrients from agricultural fields and sewage treatment plants, not by the presence of oxides of sulfur in the atmosphere.
Option D is incorrect because industrial smog
formation is caused by the release of pollutants from factories and power plants, not by the presence of oxides of sulfur in the atmosphere.