Where is the St. Lawrence Seaway?

Discover Canada places the St. Lawrence waterway in Central Canada — between Ontario and Quebec. The guide writes: More than half the people in Canada live in cities and towns near the Great Lakes and the St. Lawrence River in southern Quebec and Ontario, known as Central Canada and the industrial and manufacturing heartland. The location the test wants is therefore between Ontario and Quebec — the two Central Canada provinces along the St. Lawrence corridor.

Two provinces share the corridor. Discover Canada commits the St. Lawrence corridor to BOTH southern Quebec AND Ontario together. The river runs through both provinces; the cities and towns along it are part of the Central Canada population heartland. Where the St. Lawrence forms a border, that border is between Ontario and Quebec — the two Central Canada provinces.

The St. Lawrence has historic significance. Discover Canada writes that "Jacques Cartier was the first European to explore the St. Lawrence River and to set eyes on present-day Québec City and Montreal." So the St. Lawrence has been the historic corridor for European exploration and settlement of what is now Central Canada — from Cartier's voyages onward, through Champlain's founding of Québec City in 1608, and through the colonial-era fur trade. The river corridor connects the Great Lakes to the Atlantic Ocean — the navigable route that opened the interior of the continent to seaborne trade.

Quebec's population follows the St. Lawrence. Discover Canada writes: "Nearly eight million people live in Quebec, the vast majority along or near the St. Lawrence River. More than three-quarters speak French as their first language." So the St. Lawrence is the spine of Quebec's population pattern — and similarly for southern Ontario, the river-and-Great-Lakes system is the backbone of the province's population. Together, Ontario and Quebec — the two Central Canada provinces — share the St. Lawrence corridor, which makes the test phrase "between Ontario and Quebec" the most accurate description of where the corridor is located. The corridor connects Canada's industrial and manufacturing heartland (Ontario and Quebec, producing more than three-quarters of all Canadian manufactured goods) to the Atlantic Ocean — making the St. Lawrence corridor one of the most important waterways in North America.

The question is testing whether new citizens know where the St. Lawrence corridor is. Discover Canada places the St. Lawrence corridor in Central Canada — meaning between Ontario and Quebec, the two provinces that share its banks. The right test answer matches that.

The wrong answer choices each substitute a different region. The British-Columbia option places the corridor on the Pacific coast — wrong; that is the West Coast province. The Atlantic-provinces option places it on the east coast — wrong; the corridor runs from the Atlantic into the Great Lakes through Central Canada. The Prairie-provinces option places it in the interior plains — wrong; the Prairies are far from the St. Lawrence. Only between-Ontario-and-Quebec matches.