A. Water compacts when it freezes, making ice more dense than water.
B. Water expands when it freezes, making ice less dense than water.
C. Ice is afraid of water, and avoids it.
D. Hydrogen bonds in water push the ice to the surface.
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The correct answer is B. Water expands when it freezes, making ice less dense than water.
When water freezes, its molecular structure forms a crystalline lattice that takes up more space, causing ice to be less dense than liquid water. This is why ice floats on water.
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