It would be the Grand Canyon and Pelican Island that are attributed to the efforts of President Roosevelt, since he was one of the very first presidents to make conservation a prominent issue.
Answer: On November 6, the United States recognized the Republic of Panama, and on November 18 the Hay-Bunau-Varilla Treaty was signed with Panama, granting the United States exclusive and permanent possession of the Panama Canal Zone.
Explanation:the answer is towards the bottom
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