The correct answer from each drop-down menu is more continental land, mountains on land, mid-ocean ridges.
How the theory of seafloor expansion?
The expansion of the bottom floor is a geological process, which states that the structures of the ocean floor are the action of materials from man, through materials from convection currents. When emerging in the dorsal zones, the magma - co and the dorsal, opening a kind of slit in its crest.
The seafloor expansion hypothesis was put forward in the 1960s by scientists Hess and Dietz, where they proposed that the crust separates along rifts in the mid-ocean ridges and that the new seafloor is formed by the ascent of new crust.
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