Final answer:
Vancouver is the city that offers important shipping and air links between Canada and countries across the Pacific, thanks to the Port of Vancouver which facilitates significant trans-Pacific trade.
Step-by-step explanation:
The city that provides important shipping and air links between Canada and other countries across the Pacific Ocean is Vancouver. Vancouver is home to Canada's largest and busiest port, the Port of Vancouver, which serves as a major gateway for trans-Pacific trade. The city's strategic location along the west coast of Canada makes it an essential hub for maritime and air transport, connecting Canada to Asia and other parts of the world.