I assume by "feds" you mean the federal government. They enforce national laws. While the states can make their own laws they must do so by abiding by federal law. For example, a state cannot make murder legal.
The term that best describes the United Kingdom’s process of returning the delegation of authority from the central government back to the regional governments of <span>Scotland, Wales, and Northern Ireland would be "devolution," since this is the opposite of a transfer of power to a higher level. </span>
If I'm correct it's b I think know