Question

__________________ are the deepest features of the ocean and they are formed at subduction zones.

Answer 1

Answer:

Ocean trenches are long, narrow depressions on the seafloor. These chasms are the deepest parts of the ocean—and some of the deepest natural spots on Earth. ... At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

Answer 2

Answer:

ocean trenches are the deepest features of the ocean and they are formed at subduction zones

Explanation:

Oceanic trenches are formed at subduction zones. Oceanic plates meet continental plates in the water, so trenches are formed as the oceanic plate goes under the continental plate. These trenches can be very deep if the plate that is subducting (going down) is an older and colder plate. Younger oceanic plates are less dense and the angle will be shallower. The Mariana Trench is the deepest point on Earth and a prime example of a deep subduction zone.