Fog most frequently forms at night and disappears during the day. explain why.

At night, everything cools down. The air condenses at a low level (as in land/sea level).

Throughout the day, the sun is out and heats up the particles in the fog. Making it rise. Heat, in other words, rises.

Fog is a form of condensation, or also known as a cloud.

I hope this helps! (:

D, the answer is letter d. because even though fossil fuels take a very long time to form, they do form in the ground just like coal and others.