Which of the following responsibilities is not required by law in the United States?

In the United States, obtaining a driver's license is not a legal requirement mandated by federal law. While each state sets its own regulations regarding driving and licensing, they do not impose a legal obligation on citizens to obtain a driver's license. This means that individuals who do not wish to drive vehicles are not required to obtain one, whereas voting in elections, paying taxes, and serving on a jury are established responsibilities that citizens are legally required to fulfill. Voting is a civic duty tied to the rights of citizenship, paying taxes is a legal requirement to fund government services, and serving on a jury is mandated to ensure a fair trial process. In contrast, the decision to obtain a driver's license is based on personal choice and the need to drive rather than a legal obligation.