What are the 4 basic of clouds?

The four basic types of clouds are cirrus, cumulus, stratus, and nimbus. Cirrus clouds are high-altitude, thin, and wispy, typically indicating fair weather. Cumulus clouds are fluffy and white, often associated with sunny days but can develop into storm clouds. Stratus clouds form in uniform layers, covering the sky and often bringing overcast conditions, while nimbus clouds are rain-bearing and can appear in various forms, indicating precipitation.