No, Toronto is not a formal region, it is a functional region.
coastal region
west?
the smallest Canadian land form region is The Great lakes St- Lawrence lowlands
the Canadian shield
the Canadian shield.
Great Plains
Great western platea
The Canadian Shield, Hudson Bay Lowlands, and Great Lakes/St.Lowlands
the Alps
Toronto
Depends on your definition of "region"...The Greater Toronto Area, metropolitan areaThe Greater Toronto-Hamilton Area, metropolitan area that also includes the nearby City of HamiltonSouthern Ontario, southern region of provinceOntario, province