Cumulus, stratus, and cumulonimbus clouds are distinct cloud types based on their characteristics.
Cumulus clouds are puffy white clouds with flat bottoms that form by convection. On the other hand, stratus clouds occur low in the troposphere, spread horizontally, and may cover the entire sky like a thick blanket. Lastly, cumulonimbus clouds form during very unstable conditions and are associated with thunderstorms.
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