Final answer:
The worldwide rifting process releases enough magma to create ocean basins by the upwelling of basaltic lava that solidifies as new crust on the seafloor, primarily at oceanic rift zones.
Step-by-step explanation:
The worldwide rifting process involves the separation of tectonic plates along rift zones. When this happens, molten rock rises to fill the gap between receding plates, predominantly happening in oceans. This molten rock, or basaltic lava, solidifies to form the majority of the ocean basins. This is opposed to the processes such as continental collision which leads to the formation of mountain ranges, or isolated volcanic activity that can create volcanic islands. Therefore, the worldwide rifting process releases enough magma to create A) Ocean basins.
Rift zones, for example, the Mid-Atlantic ridge and the central African rift, showcase this process on both land and under the sea, respectively. In the ocean, this process significantly contributes to the creation of new oceanic crust, which consists of mafic magma that erupts on the seafloor, giving rise to extensive basalt lava flows, which gradually build the seafloor expanses that shape the ocean's basins.