What cloud type is typically characterized as white and puffy?

The cloud type that is characterized as white and puffy is cumulus. These clouds usually have a cotton-like appearance, with a flat base and a rounded top that resembles a cauliflower. Cumulus clouds develop due to convection currents, where warm air rises, cools, and condenses into visible water droplets. Their formation and distinct shape provide an indication of fair weather, although larger cumulus clouds can develop into cumulonimbus clouds, which are associated with thunderstorms.

While nimbostratus clouds are thick, grey, and uniform, they typically produce continuous precipitation and do not have the distinct puffy appearance. Stratus clouds are generally flat and overcast, resembling a haze that can lead to light precipitation, but they lack the defined, puffy structure of cumulus clouds. Stratocumulus clouds can appear lumpy and are often white or grey, but are typically lower and more uniform than cumulus clouds, which are more distinct and pronounced in shape. Thus, the clear and puffy characteristics of cumulus clouds make them the correct answer in this context.