Answer: The correct answer is "for light waves".
Step-by-step explanation:
Transverse wave: the particles vibrate perpendicular to the direction of the propagation of the wave. For example, light wave.
Polarization specifies the geometrical orientation of the oscillation. It is the characteristic of all transverse wave. If the oscillation takes place in random direction then the light is said to be unpolarized light.
Therefore, polarization can be observed for light waves.