Final answer:
The statement about Gifford Pinchot is true; he advocated for the sustainable management and renewal of the nation's reserves to ensure the resources were conserved for public benefit.
Step-by-step explanation:
The statement that Gifford Pinchot advocated for the preservation of the nation's reserves through planned use and renewal is true. As the first Chief of the US Forest Service, Pinchot led the fight against the destructive practice of clear-cutting entire forests and promoted the sustainable management of government lands. His approach, known as utilitarian conservation, was to conserve resources for the good of the public. He implemented policies that increased the number of protected forests and required lumber companies to engage in reforestation efforts, ensuring the sustainability of natural resources for future generations.