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Heat generated by the core is passed to the mantle by conduction. Which option below best describes how the flow of heat through the mantle affects the movement of the Earth's tectonic plates?
A. Heat is transferred from the mantle to the crust by radiation, which then causes the plates to move on the surface.
B. Heated material in the mantle expands (gd rises towards the crust where it then cools, forming a convection current which causes plate motion.
C. Heat conducted from the Earth's mantle moves tectonic plates due to the gravitational pull from the Earth's core.
D. Heated material in the mantle rises to the surface forming a heated cell, which causes the crust to harden and move the plates.
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