Final answer:
The pervasive need for care that leads to submissive and clinging behavior and fear of separation is characteristic of Dependent Personality Disorder (D).
Step-by-step explanation:
The pervasive and excessive need to be taken care of that leads to submissive and clinging behavior, as well as fear of separation, is characteristic of Dependent Personality Disorder (D). Unlike the symptoms listed for Obsessive-compulsive personality disorder and Avoidant personality disorder, Dependent Personality Disorder specifically entails a persistent psychological dependence on other people. This condition is also distinct from Schizoid personality disorder, which involves detachment from social relationships, and Histrionic personality disorder, characterized by attention-seeking behavior.