Are NASA CIA EPA and GSA independent agencies?

NASA (National Aeronautics and Space Administration) is an independent agency of the U.S. federal government, focused on space exploration and research. The CIA (Central Intelligence Agency) is also an independent agency, responsible for national security and intelligence. The EPA (Environmental Protection Agency) is an independent agency dedicated to environmental protection, while the GSA (General Services Administration) is not independent; it operates as a part of the federal government, providing support services to other agencies.