This is a key aspect of a unitary system of government

In a unitary state, the central government may grant some powers to its local governments through a legislative process called “devolution.” However, the central government reserves supreme power and can revoke the powers it devolves to the local governments or invalidate their actions.

the first forms of writing came from them in the form of pictographs around 3100 bc.

d. both had been uninhabited before settlers arrived.