The American island created from a hotspot is Hawaii.

Here's why:

* Hotspots: These are areas within the Earth's mantle where plumes of unusually hot magma rise towards the surface.

* Volcanic Activity: The hot magma erupts through the ocean floor, creating volcanoes. Over time, these volcanoes can grow large enough to break the surface of the water, forming islands.

* Hawaiian Islands: The Hawaiian Islands are a classic example of a hotspot volcanic chain. The Pacific Plate moves over the stationary hotspot, creating a series of islands as new volcanoes emerge and older ones erode and sink.

Let me know if you'd like to know more about hotspots or the formation of the Hawaiian Islands!