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9. PART A: Which sentence states a central idea of “Plate Tectonics:
Moving and Shaking"?
A
The most dramatic geologic activity on Earth happens at tectonic
boundaries.
B The highest mountain system on Earth, the Himalaya, was created
by the movement of tectonic plates.
C All of the world's oceans are connected by one mid-ocean ridge
system.
D The grinding of plates at a transform boundary may cause violent
earthquakes.
b