Which one of the following does not apply to sound waves in fluids?

Sound waves in fluids (liquids and gases) are longitudinal waves, not transverse. This means the vibrations occur in the same direction as the wave's propagation. Sound waves do transport energy and require a medium to travel because they propagate through the vibration of particles in the medium. The speed of sound generally increases in liquids compared to gases because liquids are denser and transmit sound more effectively.