Final answer:
Sound is not a transverse wave; it is a longitudinal wave, whereas light and radio waves are transverse because they are electromagnetic waves.
Step-by-step explanation:
The question relates to identifying which type of wave is not a transverse wave. Sound is not a transverse wave; it is a longitudinal wave, whereas light and radio waves are transverse because they are electromagnetic waves. A transverse wave involves a disturbance that moves perpendicular to the direction of the wave's propagation. On the other hand, a longitudinal wave involves disturbances that move in the same direction as the wave's propagation.
Sound waves are an example of longitudinal waves because they consist of periodic variations in pressure that move in the same direction as the wave itself travels through air or water. Contrastingly, light waves and radio waves are forms of electromagnetic waves and are hence transverse in nature. Therefore, out of the options given, sound is not a transverse wave.