You are presented with the question "What is a result when warm air advances on cold air?" and the following answer choices: 
- heat
 - dry air
 - blue skies
 - rain
 - storms
 - drought
 - Injury
 - force

Now knowing that awarm front causes cloudy and rainy weather and if warm air is advancing on cold air, the front is designated a warm front, choose the best answer.


 

    rain     