What did roosevelt do which had never been done before in conservation?

What President Roosevelt did which has never been done before in conservation was that the president made conservation a major part of his administration. He was a dynamic force in the new movement which was known as conservationism. The president saw the need to preserve natural resources and he put in place appropriate mechanisms to do this. At the end of his tenure, he had already built five national parks, four game refugees, fifty one national bird reservations and national forest service.

The answer is option e.