Explain how the location of seas and deserts are natural barriers . how is this different in mesopotamia

A natural barrier refers to a physical feature that protects or hinders travel through or over. Seas serve as a medium for transport along coastlines and deserts serve as a barren area of the landscape where little precipitation occurs and consequently, living conditions are hostile for plant and animal life. In Mesopotamia, it does not have any natural barriers so there was a wall created to protect the land. It is the area between the Tigris and Euphrates river, Mesopotamia was located in an extremely fertile place surrounded by deserts and no natural barriers.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

b. introduce the core ideas of the new government.