Answer:Geographic featured that acted as norther borders of the Roman Empire at its height were: Rhine River, Danube River, Carpathian Mountains, and the Black Sea.
Explanation: (2,-8) because thats how i got the answer
One negative consequence could be that the economy can't grow and get better.
Prevailing winds bring air from one type of climate to another climate. In example, warm winds that travel over water tend to pick up or collect moisture as the travel; by the water vapor in the air, it then moves to colder climates; and those climates collect heavy rainfall.