Considering stanley and marcia mckinley's care of ruth, their elderly mother, as well as their young adult daughter, would be consistent with the perspective.

The answer is: Developmental perspective

Developmental perspective happen as people grow older and experience a massive change in either our physique, way of thinking, and social responsibilities.

This could be shown in how our role changes in the family as we grow older. When we young we tend to obey and follow our parents and we would gained more and more independence until we are old enough to do the caring.