Question

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

A. subduction.
B. plate tectonics.
C. folding.
D. convergence.

Answer 1

The answer is A. subduction

Answer 2

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".