which of the following best explains the potential impact of rising global temperatures on agricultural regions? responses the wheat belt will shift northward. the wheat belt will shift northward. mediterranean agriculture will expand southward. mediterranean agriculture will expand southward. polar regions will dry out, making cultivation impossible. polar regions will dry out, making cultivation impossible. nomadic herding will end as conditions become too harsh. nomadic herding will end as conditions become too harsh. centers of market gardening will shift to the arctic circle.