Suggest why water expends when it freezes

I have a chemistry 3 mark question that said: Suggest why water expends when it freezes.
I know that the reason most substances contract is because the electrostatic forces holding the particles together are stronger and therefore, the particles are closer together. So I can only assume that because there must be more space between the H2O molecules, the forces must have weakened. I still this right? I always struggle on: "suggest" questions.

Thanks. (GCSE)

I have a chemistry 3 mark question that said: Suggest why water expends when it freezes.
I know that the reason most substances contract is because the electrostatic forces holding the particles together are stronger and therefore, the particles are closer together. So I can only assume that because there must be more space between the H2O molecules, the forces must have weakened. I still this right? I always struggle on: "suggest" questions.

Thanks. (GCSE)

When the water molecules stop moving as the water solidifies, the hydrogen bonds hold the molecules into a diamond-like lattice, which is more open (and hence less dense) than the average positions of molecules formerly able to rotate and translate in the bulk liquid.

Ok thanks, but we don't learn about what hydrogen bonds are in GCSE science OCR so they can't be looking for the correct answer. My point is, can you can marks for a suggest question if your point is logical. Therefore would my answer warrant any marks