What features indicate a convergent plate boundary?

The presence of deep ocean trenches and mountain ranges is indicative of convergent plate boundaries due to the geological processes that occur when two tectonic plates collide. At convergent boundaries, oceanic plates often sink beneath continental plates, leading to the formation of deep ocean trenches. This subduction process can also result in the creation of mountain ranges as the continental crust crumples and is forced upwards, such as the Himalayas, which have formed from the collision of the Indian and Eurasian plates.

This specific relationship between the movement of tectonic plates and the resulting geological features illustrates how convergent boundaries are characterized by intense geological activity, including earthquakes and volcanic activity, but their most distinctive features are indeed the deep ocean trenches in oceanic collisions and the towering mountain ranges in continental collisions. The other choices either represent features that do not directly relate to the processes at convergent boundaries or are characteristic of different geological settings.