"This divide runs from Cape Prince of Wales in western Alaska, through the Rocky Mountains of western Canada and the continental United States, then through the Sierra Madre Occidenal mountains in Mexico, through central America and along the Andes Mountains or South America"
The answer you are looking for is "<span>a. elements of ecosystems are mutually dependent on each other ".</span>
The answer is no because the US has 3,909 more people
Iraq it has boundarys that are arbitrarily drawn, with no real common bondage among the people.