Final answer:
National Parks have the highest protection level among the listed options of United States public lands.
Step-by-step explanation:
National Parks have the highest protection level among the listed options of United States public lands. These areas are designated by the federal government for their unique natural and cultural resources and are managed to preserve them for future generations. Examples of national parks include Yellowstone, Grand Canyon, and Yosemite. They have strict conservation policies and limited activities allowed to safeguard their ecological and historical significance.
Learn more about Protection level of United States public lands