Biology

The correct answer is: A.Air pollution.

Air pollution refers to the contamination of the atmosphere by pollutants, which can come from both human sources (such as vehicle emissions, industrial activities, and burning of fossil fuels) and natural sources (such as wildfires, volcanic eruptions, and pollen). These pollutants can harm human health, the environment, and contribute to global issues like climate change.

Here’s why the other options aren’t the best fit:

B.Smog is a specific type of air pollution, often a mix of smoke and fog, typically...