A system of government in which all authority is given to a monarch, an individual ruler who functions as head of state

define it but short

Monarchy - A government system in which a single individual, known as a monarch, possesses all the power and serves as the highest authority in a country.

A type of democracy in which elected people represent a group of people

Representative democracy - A form of democracy where citizens elect individuals to represent their interests and make decisions on their behalf. These elected representatives form a governing body, such as a parliament or congress, and are responsible for making laws, formulating policies, and representing the needs and desires of the people they represent.

A system of government in which a state is ruled by representatives of the citizen body

Republic - A system of government where the power ultimately lies with the citizens, who elect representatives to act on their behalf. These representatives, typically organized in a parliament or congress, make decisions and govern the state. The head of state may be an elected president or a monarch with limited powers. In a republic, the emphasis is on the rule of law and the rights and interests of the citizens.

A system of government run by a clergy or laity from a particular religion

Theocracy - A form of government in which religious leaders or a religious institution holds the ultimate authority and governs in accordance with their religious beliefs and principles. In a theocracy, religious law is typically enforced, and religious leaders play a significant role in shaping and implementing government policies. The governing body may consist of clergy members or individuals chosen from the religious community. Decisions and laws are often based on religious texts and teachings.