If clouds are formed by something evaporating into colder regions of the atmosphere and condensing, then clouds are formed by what going to colder regions?

Answer choices:
- Movement of an air mass
 - Something that evaporated
 - Something that melted
 - cloudy and rainy weather
 - Something that stayed the same
 - Something that froze
 - precipitation
 - air mass over Earth's surface

 

  Something that evaporated        