What features of an alien planet would you look for in order to determine if the planet experiences plate tectonics?

Large moving plates make up the crust of Earth, and the places where the plates converge, diverge, and converge are known as plate boundaries.

Plates move past one another to change plate boundaries, as seen in the case of the San Andreas Fault Line.

Divergent plate boundaries that are moving apart produce mid-ocean ridges.

At convergent boundaries, as tectonic plates move towards one another, they frequently produce composite volcanoes and earthquakes, which also result in the formation of mountain ranges.

The land moves along with these plates, just as the Earth's continents did.

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To determine if an alien planet experiences plate tectonics, you would look for features such as surface geological activity, mountain ranges, and evidence of subduction zones or mid-ocean ridges. Additionally, analyzing the planet's surface composition, seismic activity, and magnetic field could provide further indications of plate tectonics.