Which cloud types are categorized as low clouds?

Low clouds are typically defined as those that develop from the surface up to about 6,500 feet (2,000 meters) above ground level. The types of clouds that fall into this category include stratus and nimbostratus.

Stratus clouds are often seen as uniform gray clouds that can cover much of the sky and lead to overcast conditions, while nimbostratus clouds are thicker and bring continuous precipitation.

Both of these types are characterized by their low altitude and are known to produce light rain or drizzle, making them significant in the context of aviation, where visibility and weather conditions are critical for safe operations.

In contrast, other choices include clouds that are higher in altitude, such as cumulus and cumulonimbus which are classified as mid to high clouds, and cirrus and cirrostratus which are found at high levels in the atmosphere. Hence, option C correctly identifies the types of clouds classified as low clouds.