Final answer:
An island arc is the result of plumes of hot mantle rising in a hot spot within a plate.
Step-by-step explanation:
The region that is the result of plumes of hot mantle rising in a hot spot within a plate is an Island arc. Island arcs are curved chains of volcanic islands or a chain of volcanic islands formed on the overriding plate at a convergent plate boundary in association with a subduction zone. They are created when an oceanic plate subducts beneath another oceanic plate or a continental plate.