Answer:
B. In the Pacific ocean where an oceanic plate is subducting beneath a
continental plate.
Explanation:
Deep ocean trenches are being formed in the Pacific ocean where an oceanic plate is subducting beneath a continental plate.
Ocean trenches are natural depression within the earth usually formed along the margins of convergence between two plates.
- An oceanic plate is denser when compared to a continental plate.
- As they converge, the denser plate plunges under the lighter one.
- This creates a subduction zone between the two boundaries.
