Tsunamis:
a. Are high out in the ocean, where they menace ships, but get shorter as they approach shore, where they quietly flood among coastal houses.
b. Are long, low waves out in the ocean that pile up near shore where they are squeezed by earthquake p-waves. Are Asian legal devices that involve lawsuits.
c. Are almost always towering waves out in the ocean, which stay more-or-less the same size when they approach shore.
d. Are long, low waves out in the ocean that pile up near shore because such waves, or parts of such waves, move slower in shallower water.