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Which of the following means characteristic of old age? Decoding Senescence, Geriatrics, and Gerontology

According to the U.S. Census Bureau, the number of Americans aged 65 and older is projected to nearly double by 2060, making it more important than ever to understand the nuances of the aging process. This growing demographic highlights why clarity is crucial when answering the question, "Which of the following means characteristic of old age?"