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The correct answer to the multiple-choice question is:
- Large pieces of Earth's lithosphere that move.
Tectonic plates are massive slabs of the Earth's lithosphere (the rigid outer layer of the Earth) that fit together like a puzzle and float on the semi-fluid asthenosphere beneath them. These plates are in constant motion, shifting due to the heat-driven convection currents in the mantle beneath them. The movement of these plates is responsible for various geological phenomena such as earthquakes, volcanic eruptions, and the formation of mountains.
Understanding tectonic plates is crucial in the field of geology as it helps explain the dynamics of the Earth's surface and how different landforms are created and modified over time. If you have any more questions or need further clarification, feel free to ask!
