A type of government in which all key powers are given to the national or central governmtnetn

Answer: Unitary system of government

Explanation:

Unitary system of government is known to be a type of government in which the central government is the head and has absolute control over all the states. The state is divided into subdivisions and they exercise their power in accordance with the authoritative instructions and control of the central government. Furthermore, the laws made remain the same in all the states and the central government governs the states without terror and is not answerable to anyone. Thus, examples of countries with this type of government include United Kingdom, China, France and so on.