Final answer:
A rift basin is associated with divergent plate boundaries where tectonic plates move apart and new crust is formed from molten rock. On the other hand, subduction zones, marked by ocean trenches like the Japan Trench, are where one plate moves beneath another and melts into the mantle.
Step-by-step explanation:
A rift basin is associated with a divergent plate boundary. This is where two tectonic plates are moving apart from each other, and as they do, the space between them is filled with molten rock that solidifies to form new crust. Rift basins can be found both on land and beneath the oceans. The Mid-Atlantic Ridge is an example of an underwater rift zone, and the East African Rift is a continental rift zone example.
In contrast, a subduction zone is where one plate moves under another and is forced into the mantle where it eventually melts. This type of plate boundary is associated with some of the world's deepest earthquakes, which typically follow a pattern where the depth increases from the coast to inland. A prime example of a subduction zone is the Japan Trench near the coast of Asia.