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

Fact 2: Crumple the foil then carefully reopen it.

Given the two facts above, answer the question "what can be changed from smooth to compacted by physical force?" with the following options: 
- Roads
 - dirt
 - h2o
 - soils
 - foil
 - wood
 - oxygen
 - hair


 

     foil    