Osmotic pressure is a property of liquids. It refers to the pressure exerted by a solvent when it flows through a semipermeable membrane to equalize the concentration of solute on both sides. This is a property of liquids and solutions.
Freezing point is a property of liquids. It is the temperature at which a liquid changes into a solid under normal atmospheric pressure. Different liquids have different freezing points.
Diffusion is a property of liquids. It is the process by which molecules or particles spread out from an area of higher concentration to an area of lower concentration. It occurs in gases, liquids, and solids, but it is particularly notable in liquids.
Melting is not a property of liquids but rather a phase transition between the solid and liquid states. It is the process by which a solid substance changes into a liquid as it is heated to its melting point.
The correct option is D. Melting. Melting is not a property of liquids but a process that occurs when a solid is heated to become a liquid.