The two correct answers to the question about the effects of burning fossil fuels on the atmosphere are:
-
increases levels of gases that retain the sun's heat - Burning fossil fuels releases greenhouse gases, such as carbon dioxide and methane, which trap heat in the atmosphere and contribute to global warming.
-
increases levels of particulate matter - The combustion of fossil fuels also releases particulate matter, which can have detrimental effects on air quality and human health.
The other options do not accurately represent the effects of fossil fuel combustion.