Law of conservation states that matter is neither created or destroyed.
So what do you think?
Answer: a common language, history, or place of orgin.
Explanation:
Some of the US states that borders Canada are Minnesota, New York and Idaho
To be frank, I don't think your question is specific enough, but I would say that the answer would be the Rocky mountains, or just mountains. those are the only major kinds of landforms I can think of