Which of the following is an example of economic interdependence?

students in germany use the internet to communicate with scientists in brazil.

construction companies in canada build skyscrapers with steel imported from the united states.

cattle ranchers in oklahoma sell beef to grocery stores in maryland.

immigrants from russia settle in london.

im timed!

Construction companies in Canada build skyscrapers with steel imported from the United States. This is an example of economic interdependence. In fact, the steel may come from iron ore exported from Canada to thhe e US such as from the prolific Labrador Trough in Quebec and Labrador and then if the steel is made in the US it can be shipped back to Canada to form a raw material to build the skyscrapers with. 

Answer they are produced by collision of tectonic plates;