Who grants full protection to migratory birds and their parts?

The U.S. Fish and Wildlife Service is the agency responsible for granting full protection to migratory birds and their parts under the Migratory Bird Treaty Act. This act is a crucial piece of legislation that aims to conserve migratory bird populations, which often travel across various states and countries. The U.S. Fish and Wildlife Service administers the regulations that protect these birds, making it illegal to hunt, capture, or kill them without proper authorization.

This protection encompasses not only the birds themselves but also their nests and eggs. The agency works to ensure the sustainability and conservation of these species by managing their habitats and addressing threats that may impact their populations. The other options either do not have this particular responsibility or focus on different environmental or wildlife management areas.