In relationships, self-disclosure and the sharing of private thoughts are hallmarks of intense closeness, or .

In relationships, self-disclosure and the sharing of private thoughts are hallmarks of intense closeness, or intimacy.

Explanation:

In psychology, intimacy is defined as the physical and emotional closeness between individuals. People who are intimate - and not necessarily in a romantic way - feel free to express their emotions, thoughts, opinions, and fears, for instance. Such freedom brings with it a feeling of being understood, accepted, appreciated, and cared for.

answer; participant observation method;