Clouds giving long-duration uniform rainfall are generally of what nature?

Correct answer: Layered and widespread

Correct answer: A, layered and widespread. Long-duration, relatively uniform rainfall is commonly associated with broad stratiform cloud cover, especially nimbostratus in suitable conditions. These clouds spread over a large horizontal area and usually have limited vertical development compared with towering convective clouds. Their extensive moisture-bearing layers allow precipitation to continue over time, although the exact intensity depends on lifting, moisture, temperature, and cloud depth. B is wrong because isolated small cloud patches more often produce localized or intermittent showers rather than broad uniform rain. C is wrong because clouds are visible collections of water droplets or ice particles, even when thin or difficult to see. D is wrong because clouds are not made of sand or solid slabs. Memory cue: “Layered and widespread often means steady; towering and localized often means showery.”