After high school, graduates who move away, often notice that they just don't stay in touch with their friends from home as they did when in school togetherthis is an example of.

This is an example of maturity.

Explanation:

The process of leaving the house where we grew up and moving to college is part of growing up and entering adult life. This process has several effects, one of which is the loss of contact with some childhood friends. This happens because of the new environments to which we are introduced in college, the new people we know and the common maturity to which we are submitted that makes us change our interests and contacts.