Answer:
The Great Lakes are one of the world’s largest surface freshwater ecosystems. about 21% of the world's supply of surface fresh water.
The Great Lakes of North America are a group of five freshwater lakes that straddle the boundary between the United States and Canada. If you look at the political map on this page, you will see that much of the international boundary between the two countries passes over the waters of the lakes.
Step-by-step explanation: