A news article says the Spirhalite Islands resurfaced after a shift in what?

The Spirhalite Islands resurfaced after a shift in Earth's tectonic plates.

In the game's story, reports say the legendary archipelago has emerged from the ocean because Earth's tectonic plates shifted. That geological event establishes why the islands are suddenly accessible and gives Splatoon Raiders its central setting: a remote chain of land filled with treasure, ruins, storms and hostile Salmonids.

The wording points to plate tectonics, the scientific framework describing Earth's rigid plates moving over the planet's deeper interior. In real geology, plate movements can produce earthquakes, uplift, volcanic activity and changes in ocean basins. Raiders uses that recognizable Earth-science idea as fictional world-building rather than presenting a detailed real-world geological case study.

Several alternatives can sound plausible in a dramatic island story. Volcanic vents can build islands, ocean currents can move sediments and magnetic-pole changes affect navigation and geophysics, but none is the stated cause here. The game's plot explicitly connects the islands' return to a shift in tectonic plates, making that the canonical quiz answer.