You are presented with the question "Why do pipes sometimes burst during the winter" and the following answer choices: 
- Water evaporating
 - flooding
 - Water expanding
 - energy usage
 - Water melting
 - Water contracting
 - colder weather
 - massive damage

Now knowing that when water freezes , that water expands and water pipes can freeze and burst, choose the best answer.


 

   Water expanding      