You are presented with the question "What happens when water reaches zero degrees Celsius? " and the following answer choices: 
- vaporization
 - it shrinks
 - colder weather
 - It expands
 - it boils
 - flooding
 - nothing
 - erosion

Now knowing that when water freezes , that water expands and water freezes at zero degrees Celsius, choose the best answer.


 

    It expands     