A state that is ruled by an elected citizen is called a republic. In a republic, the citizens have the power to elect their leaders, who are then responsible for governing the country. This is different from a monarchy, where the ruler is usually a hereditary monarch, and an empire, which is typically ruled by an emperor who has seized power through force.
In a plutocracy, the country is ruled by wealthy individuals who have acquired significant economic power and influence. This is not the same as a republic, as the citizens do not necessarily have a say in who governs them.
Overall, a republic is a form of government that is based on the principle of elected representation, where the people choose their leaders through a democratic process.