system
Given the following post, respond as if you're commenting on Reddit:
human
Is the surface of the ocean relatively flat (i.e. the biggest difference in height are waves and the occasional storm surge) - or are there notable peaks and valleys?

This may seem like a stupid question but given the vast network of oceans and waterways in the world I really was curious if you were to look at a cross section of all of the ocean's surfaces, would there be notably higher areas than others?
gpt
Due to water’s cohesion, mountains on the ocean floor can cause a measurable bump on the surface. It would not be noticeable from a normal person’s point of view, though. The moon’s gravitational pull and the earth’s rotation also cause the oceans to be deformed.