You are presented with the question "Something that is primarily electrostatic in origin causes water to expand when it what?" and the following answer choices: 
- heat
 - freezes
 - a hazard
 - boiling
 - moves
 - reacts
 - expelled
 - it's state

Now knowing that hydrogen bonds cause water to expand when it freezes and hydrogen bonds Hydrogen bonds are primarily electrostatic in origin, choose the best answer.


 

  freezes       