Final answer:
Rift valleys, island arcs, and subduction zones are features that form at different types of plate boundaries.
Explanation:
Rift valleys form at a divergent boundary, where tectonic plates move apart. A notable example of a rift valley is the East African Rift.
Island arcs are formed at ocean-ocean convergent boundaries where one oceanic plate subducts beneath another, leading to volcanic activity. Examples of island arcs include Japan and the Philippines.
Subduction zones are regions where one tectonic plate slides beneath another. They occur at convergent plate boundaries and are associated with deep ocean trenches.
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