What defines stratus clouds in the atmosphere?

Stratus clouds are indeed characterized by their formation in layers and their flat appearance. This type of cloud typically covers the sky like a blanket and can often lead to overcast conditions, creating a uniform grayish look. Stratus clouds develop at low altitudes, typically below 2,000 meters (6,500 feet), and they can produce light precipitation, such as drizzle. Their flat, layered structure distinguishes them from other cloud types that might have more vertical development or a fluffy texture. This is directly aligned with the definition and characteristics of stratus clouds within meteorological literature, making it the most accurate choice.