Answer:
Tectonic plates are:
enormous pieces of Earth's crust and upper mantle that fit together like pieces in a jigsaw puzzle.
Explanation:
Tectonic plates are gigantic pieces of Earth's crust, that is, parts of the Earth's surface. They are also called lithospheric plates. The plates are shaped irregularly, and their sizes can vary, some reaching thousands of kilometers. Those pieces move in relation to one another. When they move together, their movement causes earthquakes. The largest tectonic plate in the world is the Pacific plate, which has over 100 million square kilometers. This plate is, however, mainly underwater.