Question

what happens in the circled area? creation of crust process of subduction formation of volcanoes occurrence of earthquakes

Explanation:

The circled area shows the boundary between the North American Plate and the Pacific Plate. At transform plate boundaries (where plates slide past each other), earthquakes are common. Subduction (one plate going under another) occurs at convergent boundaries (not shown as subduction - like arrows here). Crust creation is at divergent boundaries. Volcano formation is often at convergent (subduction) or divergent boundaries. Since the movement here is sliding (transform boundary characteristic), earthquakes are the main event.

Answer:

occurrence of earthquakes