You are presented with the question "What will prevent the formation of sand dunes?" and the following answer choices: 
- focusing a lens
 - forces
 - energy barrier
 - flooding
 - erosion
 - less water
 - Solar energy
 - vegetation

Now knowing that sand dunes are formed by the wind transporting and depositing sand and vegetation stabilizes the sand, preventing the wind from forming dunes, choose the best answer.


 

        vegetation 