Question

ocean ridges form as a result of ________. a. slab pull b. the upwelling of magma from the asthenosphere c. sediment being deposited from the ocean d. all of the above please select the best answer from the choices provided

Explanation:

Ocean ridges are formed at divergent plate boundaries. At these boundaries, magma from the asthenosphere (the semi - molten layer beneath the lithosphere) upwells. As the magma rises, it cools and solidifies, creating new oceanic crust. This continuous process builds up the ocean ridges. Slab pull is a mechanism related to subduction zones (convergent plate boundaries) and is not the cause of ocean ridge formation. Sediment deposition from the ocean does not form ocean ridges; it can create other features like abyssal plains or continental shelves in some cases.

Answer:

B. the upwelling of magma from the asthenosphere