Which of the following best explains why Earth is tectonically active? A. Areas of Earth's solid surface layer are thicker and so heavier than other areas.
B. Areas of Earth's solid surface layer are under great pressure from ocean water.
C. Earth's solid surface layer sits on a moving, semiliquid layer.
D. Earth's solid surface layer rotates more rapidly than the layers beneath it.

C. Earth's solid surface layer sits on a moving, semiliquid layer.

Explanation:

Earth is highly tectonically active because the solid layer of the earth sits on a moving, semi-liquid layer.

The earth's crust is broken into slabs. Together with part of the upper mantle, they form a layer called the lithosphere. These solid lithospheric bodies are called tectonic plates.

Under the plates is a semi-molten layer under great temperature. As the molten layer moves, it carries the lithosphere on top of it. This causes the movement of the plates in different directions. The semi-liquid layer is called the asthenosphere

This is the reason why the earth is tectonically active.

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The correct option to this statement would be true