You are presented with the question "Ice wedging causes what to be severely damaged?" and the following answer choices: 
- an object
 - ice roads
 - lights
 - fields
 - trees
 - vehicles
 - arteries
 - coastlines

Now knowing that ice wedging is when ice causes rocks to crack by expanding in openings and an ordinary ice road is therefore severely damaged by cracks induced by the traffic, choose the best answer.


 

  ice roads       