Stratus clouds --- Associated with overcast days and the rainstorms.
Cirrus clouds --- Indicate fair weather
Fog. ---- forma when the warm air flows over a closed ground
Explanation:
Cumulus clouds have a flat base and are described as the cotton shaped and are puffy. These are low-level clouds of 2,000 meters of height. They are preforms of the type pf the cumulonimbus.
Stratus clouds are the low-level clouds that are characterized by horizontal layering and a uniform base and are described as flat hairless and featureless.
The circus clouds are characterized by a thin and a is a type of the curly locks of hair form along at an altitude of 16,500 ft and are light grey.
While fog is a visible form of the water droplet that is suspended on the air near the surface of the earth and is considered as a low lying cloud.