Ocean trenches such as the Tonga and Marianas Trench,are
A)subduction zones where lithosphere is pulled down to the asthenosphere.
B)some of the steepest places on Earth.
C)found at continental-continental plate boundaries that mark the the deepest places on Earth.

Question

Quizplus · Accepted Answer

Ocean trenches are formed at subduction zones where a denser oceanic plate is pulled down into the asthenosphere beneath a less dense continental plate. The Tonga and Marianas Trenches are examples of such subduction zones. Option B is partially correct as ocean trenches are indeed some of the steepest places on Earth, but this alone does not fully describe their origin. Option C is incorrect as ocean trenches are not found at continental-continental plate boundaries.

Ocean Trenches Such as the Tonga and Marianas Trench,are