What process created the Aleutian Islands next to trench?

The Aleutian Islands were formed by the process of subduction, which occurs when one tectonic plate moves beneath another. In the case of the Aleutian Islands, the Pacific Plate is subducting beneath the North American Plate. This process has created a deep trench, known as the Aleutian Trench, which is located just to the south of the islands. The Aleutian Islands themselves were formed by volcanic activity that occurred along the subduction zone. As the Pacific Plate moves beneath the North American Plate, it melts and rises to the surface, forming volcanoes. Over time, these volcanoes have built up and formed the chain of islands that we know today as the Aleutian Islands.