The theory that the relationships maintained by older adults are fewer in number but closer and of a higher quality than relationships they had at younger ages is

Socioemotional selectivity theory

Explanation:

Socioemotional selectivity theory  is the theory that is based on the span of life influencing motivation.This concept states about contraction of time scope in terms of age in humans, makes a person become more selective in nature.

Person tends to make time for meaningful acts and events of life. They invest their emotion, thoughts and resources for the goals they actually desire emotionally rather than any calculated-future goal at the time of aging and constraint health.

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