Upon retirement, some retirees save money by a. buying larger homes b. traveling to visit relatives in various locations c. moving to live with their children d. starting their own businesses .

Upon retirement, some retirees save money by moving to live with their children (C).

It would be impossible to save money by buying a larger home or by travelling to visit relatives in various location all of the time. While starting a business would create more income, it does not save money. One effective way of saving money would be moving in with thier children as they wouldn't have to pay for rent, utilities, and maybe even food.

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answer; the federal reserve system;