Which geographic feature is indicative of a divergent boundary?

A mid-ocean ridge is indicative of a divergent boundary because it is formed when tectonic plates move apart from each other. This movement allows magma from the mantle to rise and create new oceanic crust, resulting in the formation of underwater mountain ranges. The continuous process of seafloor spreading at mid-ocean ridges contributes to the expansion of ocean basins and is a key characteristic of divergent boundaries.

In contrast, volcanic island arcs occur at convergent boundaries, typically where an oceanic plate subducts under another oceanic plate, creating volcanic activity. Ocean trenches are also associated with convergent boundaries, where one plate is forced under another. Mountain ranges can form at convergent boundaries as well, particularly when continental plates collide.