Which region contains the highest population density, and why?

• A. Great Lakes-St. Lawrence Lowlands because of favorable climate, fertile soils, and access to water and transport networks.
• B. Prairies due to flat land
• C. Atlantic Provinces due to fishing industry
• D. Northern territories due to mining

Answer: (A)

Population density measures how many people live in a given area, and it tends to be highest where cities cluster, there are abundant jobs, and transportation routes connect those communities. The Great Lakes-St. Lawrence Lowlands fits this pattern best because it contains Canada’s largest cities—Toronto, Montreal, and Ottawa—and a dense mix of manufacturing, services, and commerce. Being along the Great Lakes and the St. Lawrence River gives easy water transport, many trade links, and steady access to resources and markets, all of which attract people and support more concentrated settlement. The climate is relatively mild for Canada, and the soils are fertile, supporting both urban life and adjacent farming, which helps sustain a high population in a compact area.

In contrast, the Prairies are characterized by vast open spaces and agricultural activity spread over large distances, so settlement is more dispersed even though there are major urban centers. The Atlantic Provinces have smaller overall populations and more coastal, rural communities, which lowers average density despite active industries like fishing. The Northern territories cover enormous areas but have harsh climates, limited infrastructure, and communities that are spread far apart, all of which keep population density low.