Region features intermountain plateaus, canyons, deserts rocky mountains high, rugged mountain peaks interior plains lowlands, fertile soil appalachian mountains low, rounded mountain tops hawaiian islands rain forests, volcano tops look at the chart and answer the following question. which of the following statements best describes the physical regions of the united states? a. their features are all similar. b. they all contain mountains. c. they are dominated by plains. d. features vary from region to region. select the best answer from the choices provided a b c d