c) Gifford Pinchot

Gifford Pinchot significantly contributed to establishing scientific forestry practices in the United States. As the first head of the U.S. Forest Service, appointed by President Theodore Roosevelt, Pinchot was a key figure in the American conservation movement. He advocated for the sustainable management of the nation’s forests and played a crucial role in shaping the country’s environmental policies, promoting the idea that natural resources should be used wisely and responsibly.