The northeast became a leader in commerce because of its a. abundant mineral resources. b. many rivers. c. rolling farmlands and lush forests. d. agricultural diversity.

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.