Question

how does the fog come? how does the sit it

Answer 1

Fog can be considered a cloud at ground level. The processes forming it, however, are usually different from those that form clouds.

Like clouds, fog is made up of condensed water droplets which are the result of the air being cooled to the point (actually, the dewpoint) where it can no longer hold all of the water vapor it contains.

For clouds, that cooling is almost always the result of rising of air, which cools from expansion. But for fog, which occurs next to the ground, there are usually other reasons for this cooling.

For instance, rain can cool and moisten the air near the surface until fog forms.

Fog is a visible aerosol consisting of minute water droplets or ice crystals suspended in the air at or near the Earth's surface.[1] 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. In turn, fog has affected many human activities, such as shipping, travel, and warfare.

Answer 2

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❥Like clouds, fog is made up of condensed water droplets which are the result of the air being cooled to the point (actually, the dewpoint) where it can no longer hold all of the water vapor it contains. For clouds, that cooling is almost always the result of rising of air, which cools from expansion.