You are presented with the question "What does sharpening a knife do?" and the following answer choices: 
- change its material
 - make it stay the same
 - lowered energy cost
 - duplicate itself
 - Relieve pain
 - change its shape
 - change its color
 - It gets heated up

Now knowing that sharpening an object causes that object to change shape and very often their only metal object in the house is a cooking pot or a knife, choose the best answer.


 

      change its shape   