Vancouver serves as canada’s major pacific ocean port link to saskatoon and regina link to the great lakes atlantic ocean port

Vancouver is about as far west as you can go in Canada. It would never serve as a link to the Great Lakes nor would it be an Atlantic Ocean Port. Try Halifax for that.

Saskatoon and Regina could probably use Vancouver as a link; probably wheat and grains would be shipped to the Orient through Vancouver. But Regina and Saskatoon are in the mid west. 

The best answer is A Pacific Ocean Port. It is almost right on the Pacific.

Answer collision and mountain formation;

Just try your best buddy