What d word the ocean varies from shallow shelves to deep trenches?

The Word that describes the variation in ocean depth from shallow shelves to deep trenches is "bathymetry." Bathymetry refers to the measurement of underwater depths and the topography of the ocean floor. This term encompasses the study of submarine features such as continental shelves, abyssal plains, and oceanic trenches, providing insights into the diverse and dynamic nature of the Earth's oceans.