When two plates carrying oceanic crust collide, the heavier plate will dive under the lighter plate and sink into the upper mantle in a process called

Asubduction.
Bplate tectonics.
Cfolding.
Dconvergence.

Verified Answer :

When two plates carrying oceanic crust collide, the heavier plate will dive under the lighter plate and sink into the upper mantle in a process called "subduction," since the "sub" part of the word means "under".

The answer is A. subduction