Answer :

Insidious


There are about 7 or 8 primary tectonic plates. The lithosphere is made of about a dozen plates. The plates fit together like the pieces of a jigsaw puzzle. However, the plates can move. This causes earthquakes, volcanoes, and mountains to form.

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There are 15 to 20 primary tectonics that make up the surface of Earth. They are called Lithosphere.