Fact 1: Crumple means change shape from smooth into compacted by physical force.

Fact 2: Cellophane or paper crumpled in ball sizes.

Given the two facts above, answer the question "what can change shape from smooth into compacted by physical force?" with the following options: 
- A ruler
 - bushes
 - paper
 - streams
 - crust
 - dirt
 - cracks
 - rock


 

   paper      