Which part of the ocean is the deepest ridges seamounts rifts or trenches?

The deepest parts of the ocean are found in trenches. Trenches are narrow, steep-sided depressions in the ocean floor, with the Mariana Trench being the deepest known point on Earth. While seamounts and ridges are underwater mountains and elevated areas, respectively, they do not reach the extreme depths characteristic of oceanic trenches. Rifts, on the other hand, are areas where tectonic plates are pulling apart, often associated with mid-ocean ridges but not typically the deepest locations in the ocean.