The theory of plate tectonics states that the Earth's solid outer crust, the lithosphere, is separated into plates that move over the asthenosphere, the molten upper portion of the mantle. Oceanic and continental plates come together, spread apart, and interact at boundaries all over the planet.
Relic Boundary is the correct answer :)
It increases with distance from the ocean ridges.
The United States is an MDC.
Answer: 2) MDC or the second option.
The correct answer is D) a wide area of dry land located along the southern edge of the Sahara.I'm 100% sure for this answer.
