You are presented with the question "Crumple means_  increases by physical force." and the following answer choices: 
- threatened
 - mass
 - an object
 - density
 - movement
 - weight
 - volume
 - It expands

Now knowing that crumple means change shape from smooth into compacted by physical force and density increases with depth due to compaction and progressive cementation, choose the best answer.


 

    density     