Question

what geological features can be formed at oceanic crust boundaries? mid - ocean ridge mountain range rift valley volcanic island arc volcanic arc deep - ocean trench

Explanation:

Geological features at oceanic crust boundaries include those from divergent (mid-ocean ridges) and convergent (deep-ocean trenches) plate interactions. Mountain ranges form at continental boundaries, rift valleys on continents, volcanic arcs/arcs at oceanic-continental or oceanic-oceanic convergence but "volcanic arc" alone is broader.

Answer:

A. mid-ocean ridge, F. deep-ocean trench