Which two Federal Agencies administer the Endangered Species Act?

The Endangered Species Act is primarily enforced and administered by the U.S. Fish and Wildlife Service (USFWS) and the National Marine Fisheries Service (NMFS). The USFWS is responsible for the conservation of terrestrial and freshwater species, whereas the NMFS handles marine species. Together, these two agencies work to protect and recover endangered and threatened species through various conservation measures and regulatory mechanisms. This collaboration is essential for maintaining biodiversity and ensuring the survival of species at risk of extinction across different ecosystems, including both land and marine environments.

Other options do not include this specific combination of agencies, which is crucial for comprehensive enforcement of the Endangered Species Act, as they collectively cover all species under their jurisdiction.