Answer:
It expands when it freezes.
Step-by-step explanation:
The volume of water in solid state is more than the volume of water in liquid state. This makes water to expand on freezing.
Ice is less dense than liquid water due to hydrogen bond and cage like structure.
The other options are :
a) it contains chemical bonds: which is common for all the liquid compounds
b) it has ionic and covalent bonds: Water has only covalent bond and hydrogen bond interactions
c) After certain point all liquids boil on heating.