Final answer:
Countries in which voters can choose between two or more political parties and the majority of the adult population has the right to vote are usually called liberal democracies.
Step-by-step explanation:
Countries in which voters can choose between two or more political parties and the majority of the adult population has the right to vote are usually called liberal democracies. In a liberal democracy, citizens have the freedom to vote for different political parties that represent their preferences on important issues. This system of government allows for a broader representation of diverse viewpoints and promotes citizen participation in the political process.