Answer:
The Correct Answer is D.
Transverse wave.
Step-by-step explanation:
- In transverse waves, motion of the particles of the medium moves perpendicular in the direction of the wave.
- The upper of the transverse wave is known as the crest.
- The lower of the transverse wave is known as the trough.
- The distance from the crest on one wave to the crest on the next is called the wavelength.
- People think the transverse waves move in an up and down motion, actually which it does not.