Which canal provides the navigation connection between Lake Ontario and the upper lakes?

The Welland Canal is the correct answer because it serves as a crucial navigation route that connects Lake Ontario with Lake Erie, facilitating the movement of ships between these two major bodies of water. This canal bypasses the Niagara Falls, allowing vessels to travel smoothly across a significant height difference. It is an engineering marvel that accommodates large ships, making the transportation of goods and materials more efficient.

The Erie Canal, while important for connecting various water bodies, primarily links Lake Erie to the Hudson River and does not provide a direct connection between Lake Ontario and the upper lakes. The St. Lawrence Canal primarily facilitates shipping between the St. Lawrence River and the Great Lakes but is not a direct link between Lake Ontario and the upper lakes. The Champlain Canal connects Lake Champlain to the Hudson River and is also not involved in the connection between Lake Ontario and the upper lakes.