Question

Q. With reference to Oceanic Trenches, consider the following statements:

Which of the above statements is/are correct?

• A.
  1 and 3 only
• B.
  2 only
• C.
  2 and 3 only
• D.
  1, 2 and 3

Answer 1

The correct option is D

1, 2 and 3
Explanation:

Statement 1 is correct: Trenches are the deepest parts of the oceans. The trenches are relatively steep-sided, narrow basins. They are some 4-5 km deeper than the surrounding ocean floor.

Statement 2 is correct: Ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet.

Statement 3 is correct: As they lie along with the convergence points of oceanic plates, there is a frequent occurrence of earthquakes. The deepest ocean trenches ring the Pacific as part of the so-called “Ring of Fire” that also includes active volcanoes and earthquake zones.