Final answer:
Water, corn, and silver are natural resources found in abundance in both the United States and Canada.
Step-by-step explanation:
Water is found in abundance in both the United States and Canada. The Great Lakes, which are shared by both countries, contain about 20% of the world's freshwater supply.
Corn is another natural resource that is found abundantly in both countries. The United States and Canada are major producers of corn, which is used for various purposes such as food, feed, and ethanol production.
Silver is also found in abundance in both countries. Mexico, which shares a border with the United States, is one of the largest producers of silver in the world.