Final answer:
Continental rifts will eventually turn into ocean basins through a process called continental rifting.
Step-by-step explanation:
Continental rifts will eventually turn into ocean basins through a process called continental rifting. During continental rifting, a continental mass splits apart and two separate landmasses form and drift away from each other. This process is driven by upwelling currents in the mantle, which cause the plates to pull apart along rift zones.
Molten rock rises from below to fill the space between the receding plates, forming basaltic lava that eventually solidifies and becomes the ocean floor.