Fact 1: Hydrogen bonds cause water to expand when it freezes. Fact 2: Hydrogen bonds Hydrogen bonds are primarily electrostatic in origin. Given the two facts above, something that is primarily electrostatic in origin causes water to expand when it what?

pick from the following. 1. heat 2. freezes 3. a hazard 4. boiling 5. moves 6. reacts 7. expelled 8. it's state
The answer is:
2.