Which city is a major urban center in the Atlantic region of Canada?

• A. Halifax
• B. Toronto
• C. Calgary
• D. Vancouver

Answer: (A)

Understanding regional location is key here: the question asks which city is a major urban center in Canada's Atlantic region. The Atlantic region comprises the eastern maritime provinces and Newfoundland and Labrador, with Halifax standing out as the capital and largest city of Nova Scotia and a major port on the Atlantic coast. Its large population, busy harbor, economic activity, universities, and cultural institutions make it a prominent urban center in that region.

The other cities are located in different parts of Canada: Toronto is in Ontario, Calgary in Alberta, and Vancouver in British Columbia. While they are major urban centers, they are not in the Atlantic region, which is why Halifax is the best choice.