Hello. This question is incomplete. The complete question is:
"When warm air moves over cold air, a warm front forms. The warm air tends to rise along a gentle slope above the cold air and form layers of clouds. Given this information, which of the following cloud types and weather conditions would most likely result from an incoming warm front? cumulus clouds and clear weather, isolated cirrus clouds and clear weather, cumulonimbus clouds and thunderstorms, stratus clouds and drizzly rain
"
Answer:
Stratus clouds and drizzly rain.
Explanation:
A warm front is defined as the forefront of a hot air mass that moves forward as a "front", slides over a cooler air mass, and replaces it by directing it outward as it passes.
The origin of a warm front is due to the encounter of tropical air with colder polar air. With the warm front coming, the atmospheric pressure decreases, while the temperature rises due to the rise of hot air. The warm front is more sloping than the cold front and thus leads to different cloud types and amounts of precipitation. Cloud layers, such as cirrus or stratus, usually appear above the warm front.
The type of clouds that can result from this are stratus clouds and drizzly rain.