Which of the following age-related theories emphasizes the role of biological processes in aging?

The Genetic Aging theory emphasizes the role of biological processes in aging by focusing on the hereditary and molecular aspects that influence lifespan and the aging process. This theory suggests that genetic makeup plays a critical role in how organisms age, proposing that certain genes have been naturally selected to regulate cellular longevity and maintain homeostasis over time. Genetic factors can influence the rate of aging and susceptibility to age-related diseases, highlighting the biological underpinnings of the aging process.

In the context of aging theories, the Genetic Aging theory stands apart from others that might focus on external factors or psychological changes rather than biological mechanisms. For instance, while the Wear and Tear theory considers the cumulative damage done to cells and tissues over time, it doesn't delve as deeply into the genetic factors involved. Similarly, Cognitive aging theory examines changes in mental function, and Psychosocial aging theory addresses emotional and social factors in aging, neither of which centers on biological processes. Thus, the Genetic Aging theory provides a comprehensive understanding of aging from a biological perspective, making it the correct choice for this question.