In broad terms, the various tectonic plates, including the continental ones, rest on the mantle. More precisely, the specific layer they move on is the plastic/deformable asthenosphere.
The mantle.
mantle
The outer crust.
Transport layer
Continents and tectonic plates are sliding on the asthenosphere, which is a ductile layer of the Earth's mantle below the lithosphere. The asthenosphere allows for the movement of tectonic plates due to its semi-fluid properties.
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Tectonic Plates are part of the crust, and floats on the semi-molten rock magma layer.
The continents of the Earth are sliding through the asthenosphere. This is the viscous part of the mantle on which the plates of the lithosphere sit.
The worlds tectonic plates slide on the earths mantle.
CRUST I JUST LEARNED THAT IT'S CRUST (I think )
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I believe the answer is water.