Which of the following is classified as a legally required benefit?

Social Security is classified as a legally required benefit because it is mandated by federal law in the United States. This program provides financial assistance to retired individuals, disabled persons, and survivors of deceased workers. Employers are required to contribute to Social Security through payroll taxes, which are used to fund the program. This statute aligns with the objective of providing a safety net for citizens and promotes economic stability.

In contrast, health insurance, while recommended and often provided by employers, is not universally mandated. Tuition reimbursement and company cars are benefits that an employer may offer to enhance employee satisfaction and retention, but they are not required by law. Therefore, Social Security stands out as a benefit with legal obligations tied to it.