Question

the deepest parts of the ocean form at -
mid-ocean ridges.
abyssal plains.
continental slopes.
subduction zones.

Explanation:

Identify the deepest ocean features

Deep ocean trenches represent the deepest parts of the ocean floor.

Locate where these features form

These deep trenches are formed at convergent plate boundaries where one tectonic plate sinks beneath another into the mantle.

Match with the given options

The process of one plate sinking beneath another is known as subduction, which occurs at subduction zones.

Answer:

• mid-ocean ridges.
• abyssal plains.
• continental slopes.
• subduction zones. (Correct answer)