You are presented with the question "What is a possible negative effect of exposing soil to wind " and the following answer choices: 
- It used to be covered by water
 - exposure to cold
 - decrease in crop yields
 - greater food production
 - elimination of harmful pests
 - a tree falling
 - wind power increases
 - Damages them

Now knowing that being exposed to wind can cause erosion of soil and soil erosion causes crop yields to decrease, choose the best answer.


 

   decrease in crop yields      