Question

what type of crust is typically formed at divergent boundaries?
oceanic crust
sedimentary crust
mountain crust

Explanation:

At divergent boundaries, tectonic plates move apart. Magma rises to fill the gap, forming new crust. Oceanic crust is thin and dense, and it is commonly formed at mid - ocean ridges (a type of divergent boundary). Sedimentary crust is formed by the accumulation of sediments, not at divergent boundaries. There is no such thing as "mountain crust" in the standard geological classification related to plate boundaries.

Answer:

oceanic crust