D. methane
Soil and minerals are found in dirt, which is land, and forests are appart of land, but methane is a <span>flammable gas.</span>
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Double headed arrows indicate positive or negative effects of one variable on another
Answer:
Scientists believe that plate tectonics is an example of an internal force that changes the Earth’s crust.
Plate tectonics is a theory that describes the motion of seven large plates, and many other smaller plates of the Earth's lithosphere. When they collide they can make mountains or we can feel their motion as earthquakes. Their motion is responsible for the continental shift and it made our continents look the way they look today.
