You are presented with the question "What can affect distribution locally?" and the following answer choices: 
- Movement of an air mass
 - exposure to cold
 - a tree falling
 - dreams
 - deforestation
 - desires
 - forest is destroyed
 - Astrological signs

Now knowing that the movement of an air mass over Earth 's surface causes local weather changes and weather affects distribution locally, choose the best answer.


 

 Movement of an air mass        