Atemperature inversion occurs when

question 50 options:

stable, cold air overlays warm air

temperature decreases as altitude increases

stable warm air overlays cold air

air turbulence causes mixing between air layers

Option (3)

Explanation:

The temperature inversion is defined as the condition where the atmospheric temperature increases with respect to height. Normally, the temperature decrease with the height. A stable warm air overlays a colder air at higher elevations, during a temperature inversion condition. This inversion of temperature can also block the pollutants that rises from the lower atmospheric layers. It is because the  warm air that is present above the cooler air does not allow the trapping and merging of the substances.

Thus, the correct answer is option (3).