Question

find the reason of fog in winter season and difficulties occur due to it

Answer 1

Evaporation fog is caused by cold air passing over warmer water or moist land. It often causes freezing fog, or sometimes frost. ... The warm, moist air cools as it mixes with the colder air, allowing condensation and fog to occur. Evaporation fog can be one of the most localised forms of fog.

Answer 2

Fog is a visible aerosol consisting of minute water droplets or ice crystals suspended in the air at or near the Earth's surface. Although it has no Latin name, fog can be considered a type of low-lying cloud, usually resembling stratus, and is heavily influenced by nearby bodies of water, topography, and wind conditions.