Which of the following geographical features is not shared by the united states and canada? a. the great lakes region b. the great plains c. the rio grande d. the rocky mountainswhich of the following geographical features is not shared by the united states and canada? a. the great lakes region b. the great plains c. the rio grande d. the rocky mountainswhich of the following geographical features is not shared by the united states and canada? a. the great lakes region b. the great plains c. the rio grande d. the rocky mountains