The most important system in a democracy is the political system. Democracy is a form of government where power is vested in the people, and political systems are the structures and processes that enable the people to exercise this power. The political system includes various elements such as political parties, elections, and government institutions that are responsible for making and implementing decisions on behalf of the citizens. It provides a platform for citizens to express their opinions, participate in decision-making, and hold their leaders accountable. While the social, economic, and governmental systems are also important in a democracy, the political system acts as the foundation for the functioning of a democratic society. Alert - correct answer should be 4 (Governmental) as it refers to the specific aspect of the political system that is responsible for governing a country.