The following diagram has formed at A the feature which is known as an oceanic trench. Therefore, option A is the correct option.
What is an oceanic trench?
The long, narrow, and deep ravine on the bottom of the ocean are known as an oceanic trench. Ocean trenches are found in the deepest parts of the oceans. Here, at the bottom of the ocean floors, the ocean trenches are found because at these places the old tectonic plates of the ocean floor get pushed beneath the other tectonic plates since the plate which gets pushed is heavier due to its mass.
When this phenomenon takes place on ocean floors, valleys, and mountains especially folded mountains, earthquakes and volcanoes are formed at the ocean surface. The feature known as an oceanic trench has developed at A, as shown in the following diagram. As a result, choice A is the best one.
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