What is one characteristic that is unique to each of the cloud type?

Cumulus clouds are characterized by their fluffy, white appearance and flat bases, indicating fair weather. Stratus clouds form in uniform layers, often covering the sky like a blanket, leading to overcast conditions. Cirrus clouds, high in the atmosphere, are thin and wispy, composed of ice crystals, signaling changes in the weather. Finally, cumulonimbus clouds are towering and dense, associated with thunderstorms and severe weather, showcasing vertical development.