Final answer:
The theory of aging that suggests the older person who is more active socially is more likely to adjust well to aging is the activity theory.
Step-by-step explanation:
The theory of aging that suggests the older person who is more active socially is more likely to adjust well to aging is the activity theory. According to this theory, the more active and involved an elderly person is, the happier he or she will be. Critics of this theory point out that access to social opportunities and activity are not equally available to all.