Answer
In a transverse wave, the individual particles of the medium
(d) move perpendicularly to the direction of the wave's travel
Work Step by Step
A wave moving along a string is an example of a transverse wave. The individual particles of the string do not flow along in the same direction as the wave. Instead, the individual particles oscillate back and forth perpendicularly to the direction of the wave.
In a transverse wave, the individual particles of the medium
(d) move perpendicularly to the direction of the wave's travel
