Answer:
The answer should be the first one.
The correct answer is letter D. subduction. The process of one tectonic plate being pushed beneath another tectonic plate is called subduction. It <span>is the process that takes place at </span>convergent boundaries<span> by which one </span>tectonic plate<span> moves under another tectonic plate and sinks into the </span>mantle<span> as the plates converge.</span>