Which boundary involves two plates moving toward each other?

The correct answer is the convergent boundary because it is characterized by tectonic plates that are moving toward each other. When these plates collide, several geological processes can occur. For example, one plate may be forced underneath another in a process known as subduction, leading to the formation of mountain ranges, earthquakes, and volcanic activity. This interaction can significantly shape the Earth's surface over time.

In contrast, a divergent boundary is where two plates are moving apart from each other, leading to the creation of new oceanic crust typically at mid-ocean ridges. A fault boundary refers to breakages in the Earth's crust where plates may slide past each other, but it doesn't specifically describe their direction of movement toward one another. Lastly, a transform boundary is defined by two plates sliding horizontally past each other, which does not involve them moving toward each other either. Thus, the convergent boundary is the only type that clearly involves the movement of two plates coming together.