Fact 1: Awarm front causes cloudy and rainy weather.

Fact 2: Winds are calm and skies are clear or partly cloudy when the eye of a storm passes.

Given the two facts above, answer the question "What does a warm front cause?" with the following options: 
- friction
 - symptoms
 - rainfall
 - fire
 - tsunamis
 - heat
 - earthquakes
 - storms


 

        storms 