Which two major cities are located at the borders of Lake Ontario?

The two major cities that are accurately located at the borders of Lake Ontario are Toronto in Canada and Rochester in the U.S. Toronto is the largest city in Canada and sits directly on the northern shore of Lake Ontario, making it a central hub for economic and cultural activities in the region. On the other hand, Rochester is an important city situated on the southern shore, directly across the lake from Toronto. This close proximity between the two cities, each significantly contributing to their respective national economies, is a defining characteristic of the Lake Ontario region.

The other options include cities that do not share a direct geographical border with Lake Ontario. Buffalo, while located near the lake, is to the west of Rochester and not directly across from Toronto. Montreal, located much further east along the St. Lawrence River, is also not adjacent to Lake Ontario. Syracuse is inland and further south in New York State, thus not bordering the lake directly. Lastly, Burlington is located on Lake Ontario but lacks the status of being a major city compared to the other cities mentioned, and it does not pair with Syracuse in terms of proximity to Lake Ontario.