The answer to your question is D
30% of the earth's surface is covered by forests.
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Physical Change, although the answer is widely disputed.
Answer: Seafloor spreading occurs at <u>divergent plate boundaries.</u> As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.
