Answer: Mid Oceanic Ridge (MOR) to Deep-Oceanic trench
Explanation: As the plate tectonic theory is a continuous process, so at some places, divergent plate movement takes place whereas at other places, convergent plate movement takes place. So from that context we can conclude that
initially two plates moves apart from each other,
and this plates then collides with the other nearby plates, thereby the heavier one gets subducted beneath the other, forming a deep sea trench.
