Final answer:
Sustainable forestry is the idea of preserving, yet also using the natural resources in federal forests.
Step-by-step explanation:
The idea of preserving, yet also using the natural resources in federal forests is known as sustainable forestry. Sustainable forestry involves the responsible management of forests to ensure that they can continue to provide resources while also protecting biodiversity and ecosystem health. This approach balances economic, environmental, and social considerations to meet the needs of the present and future generations.