The ocean floor can be mapped by altimeters [all-TIH-meh-durs] on satellites. Which of the following best describes how this method functions?

W) The altimeter maps the ocean surface with radar, which is affected by underlying topography

X) The altimeter maps the floor using sonar beams attached to the body of the altimeter

Y) The altimeter communicates with an underwater remotely operated vehicle, which maps the ocean floor beneath it

Z) The altimeter communicates with a manned submersible, which maps the ocean floor beneath it
W) THE ALTIMETER MAPS THE OCEAN SURFACE WITH RADAR, WHICH IS AFFECTED BY UNDERLYING TOPOGRAPHY