Which is an example of the difference between a responsibility and a duty of a US citizen who is an 18-year-old male?

Voting is a civic responsibility: citizens are encouraged to participate, but they are not legally required to vote. By contrast, most male U.S. citizens must register with Selective Service within 30 days of turning 18, making registration a legal duty. Therefore, the example that correctly distinguishes a responsibility from a duty is “a responsibility to vote and a duty to register for selective service.”

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