Step 1: Understanding smog.
The word ‘smog’ is derived from the combination of ‘smoke’ and ‘fog’. It occurs when pollutants from vehicles, industries, and burning of fuels combine with fog in the atmosphere.
Step 2: Type of pollution.
Smog is a form of air pollution because it contaminates the air and reduces visibility, causing respiratory and environmental problems.
Step 3: Conclusion.
Therefore, smog is associated with air pollution. The correct answer is (A).