Hello aspirant,

Let me explain the entire concept of trenches,ie,oceanic trenches ,that occurs due to the crash or subduction of two or more  tectonic plates and converge into a deep narrow and long forming V-Shaped  depression.you can refer youtube videos for better perception.

hope this finds helpful.

ALL THE BEST!!!

Dear Naga,

The following are the list of types of trenches:

• Ocean Trenches: These are trenches that are present in oceans which are in deep oceans

All the best