Nimbus cloud is shown in this image (option D)
What is nimbus cloud?
A nimbus cloud falls within the low-level cloud category, known for its dark, gray hue and propensity for precipitation, such as rain, snow, or hail. These clouds, specifically nimbostratus clouds, present as dense, thick layers that blanket the sky uniformly, signaling sustained periods of precipitation.
These clouds form due to the ascent of moist air, usually in the presence of a frontal system or in areas where warm, moist air is forced to rise over cooler air. As the air rises and cools, condensation occurs, forming the cloud. Nimbostratus clouds can bring steady, continuous rain or snow for extended periods, unlike cumulonimbus clouds, which are associated with more intense, localized storm systems.