Final answer:
A pediatric nurse practitioner would use a Genogram to record detailed family history, living arrangements, and personal relationships in a new patient's database.
Step-by-step explanation:
When a primary care pediatric nurse practitioner is creating a database to record information about a family's members, living arrangement, external relationships, and behavioral and emotional issues, they will most likely use a Genogram. A genogram is a tool that graphically represents a family's medical history and personal relationships, somewhat similar to a family tree but with additional details regarding each individual's health and connections. It helps in understanding and visualizing the family structure, hereditary patterns, and psychological factors that may affect patient care.