I have not studied this but to my best knowledge the answer is D.
Northeast is the US region known as the breadbasket of America. It is a major agricultural region known for growing wheat, corn, and oats. It is also an important region for manufacturing and supports the US auto industry.
D. crust and upper mantle
because it is the two uppermost layers that moves the plates to create earthquakes, landslides, etc.
A is wrong because there is another layer in between the two called the upper mantle.
B and C is wrong because they do not contain the crust, the outermost layer of the earth.
A slow change to the earth's surface would be the formation of mountain ranges over millions of years due to the shifting of tectonic plates under the earth. Also, another slow change could be considered erosion or weathering. Two rapid changes could be landslides and earthquakes.
