Fact 1: Earth 's tilt on its rotating axis causes seasons to change.

Fact 2: Weather changes rapidly in all seasons.

Given the two facts above, answer the question "Earth's tilt on it's rotating axis causes rapid what?" with the following options: 
- temperature
 - root growth
 - population movement
 - rainfall
 - cloud density
 - weather changes
 - moon phases
 - crust pressure


 

      weather changes   