Final answer:
Social Security is indeed an example of a preventive social welfare policy, offering protection against poverty for the elderly, disabled, and dependents.
Step-by-step explanation:
The question asks whether Social Security is an example of a preventive social welfare policy. The answer is True. Social Security acts as a safety net designed to prevent poverty among the elderly, the disabled, and dependents by providing financial support. This program, initiated during the Great Depression under the Social Security Act of 1935, ensures a level of income for those who are no longer able to work due to age or disability, and thus prevents them from falling into poverty. Additionally, it can be seen as preventive because it affords individuals some protection against the economic challenges associated with aging and loss of income, thus contributing to the stabilization of society's economic well-being.