Many historians consider theodore roosevelt's greatest achievement to be?

Theodore Roosevelt was an outdoorsy person at heart, spending much of his time outdoors as a young child and through all of his life. He became president at a time where the United States was industrializing at a very fast rate. , creating the five national parks, 150 national forests, 51 wildlife refuges. That is why many historians consider his greatest achievement

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.