location
Location affecting where people live
Since Canada is located up north, because of the cold many people choose to live near the U.S. border for it's warmth.
Location impacting trade
Canada is conveniently located touching both the Atlantic and Pacific Oceans which lets Canada trade easily with Europe and Asia. Trade with U.S. is easy since they share a border. 80% of Canada's trade goes to U.S. because they joined N.A.F.T.A. and now they are able to ship freely without tariffs.