Final answer:
401(k) and 403(b) plans provide a guaranteed income and income from investments, unlike traditional pension plans.
Explanation:
401(k) and 403(b) plans are defined contribution retirement plans where workers can receive a guaranteed income and income from investments. In these plans, the employer and employee contribute funds that are then invested, offering the potential for income growth. This contrasts with traditional pension plans which offer fixed benefits without the investment aspect.
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