Final answer:
The Continuity theory posits that aging individuals adjust to old age by striving to maintain their established coping strategies, roles, and activities, contributing to their stability and satisfaction in later life.
Step-by-step explanation:
The theory of aging that suggests that previously developed coping abilities and the ability to maintain previous roles and activities are critical to adjustment to old age is the Continuity theory. This theory, developed by Robert Atchley, posits that the elderly actively make choices to maintain consistency in their internal and external structures, such as personality, beliefs, relationships, and remaining active and involved in society. The Continuity theory allows for the elderly to seek to preserve social equilibrium and stability by basing future decisions on the foundation of already developed social roles. Critics of this theory argue that it emphasizes "normal" aging and may marginalize those who deal with chronic illnesses such as Alzheimer's.