P: In addition, tsunamis move throughout the depth of the ocean and not just its surface.
Q: A tsunami wave isn’t much different in height compared to other waves in the ocean.
R: That is why a tsunami generally goes unnoticed in the open ocean.
S: But, due to its wavelength, it "piles up" when it approaches land.

A

RSPQ

B

PQRS

C

QSRP

D

SRPQ