Question

which material rises from cracks in oceanic crust?
dense crust
molten rock
continental crust
pillow - shaped rocks

Explanation:

When there are cracks in the oceanic crust, magma (molten rock) from the mantle rises up through these cracks. Dense crust is part of the oceanic crust itself and doesn't rise from cracks. Continental crust is a different type of crust (less dense, thicker) and not what comes up from oceanic crust cracks. Pillow - shaped rocks are formed when the molten rock (magma) cools quickly in the ocean water, but they are the result of the molten rock rising, not the material that rises.

Answer:

molten rock