Final answer:
In Canada, plate tectonics is evidenced by mountain formation, particularly in the Canadian Rockies resulting from the convergence of tectonic plates, and by continental drift, which continues to impact the geography of the country.
Step-by-step explanation:
The theory of plate tectonics applies to Canada in several ways, particularly with regard to mountain formation and the historical continental drift. For instance, the collision of tectonic plates has led to the uplift and creation of mountain ranges such as the Rocky Mountains. The process of continental drift has influenced the position and shape of the continent over millions of years.
In the context of Canada, mountain building is a direct result of the Pacific Plate converging with the North American Plate. This tectonic activity has led to the formation of the Canadian Rockies. As for continental drift, the gradual movement of the North American Plate away from the Eurasian and African Plates continues to shape the geography and geology of Canada.