At which location does one tectonic plate move under another?

The appropriate location where one tectonic plate moves under another is known as a convergent boundary. At convergent boundaries, two tectonic plates collide, and depending on their density and composition, one plate may be forced beneath the other in a process called subduction. This phenomenon often leads to the formation of deep ocean trenches, mountain ranges, and volcanic activity.

In the context of tectonic movements, divergent boundaries involve plates moving apart from one another, typically resulting in the creation of new crust, like at mid-ocean ridges. Transform boundaries are characterized by plates sliding past one another horizontally, which can lead to earthquakes but does not involve one plate moving beneath another. An oceanic ridge refers specifically to an underwater mountain range formed by divergent tectonic activity rather than subduction. Thus, the convergent boundary is distinctly defined by the subduction process.