If the movement of an air mass over Earth's surface causes local changes to the condition of the atmosphere, then what movement causes local changes to the condition of the atmosphere?

Answer choices:
- air mass over the moon
 - air mass under Earth's surface
 - a hemisphere is tilted away from the sun
 - energy of moving objects
 - air mass over Earth's surface
 - pressure differences.
 - wind and erosion
 - core mass under Earth

 

     air mass over Earth's surface     