Which term best describes an officer who becomes overly protective of their family?

The term "obsessing" accurately captures the behavior of an officer who becomes overly protective of their family. This term implies a continuous, intense focus or preoccupation with their family's safety and well-being, which may lead to excessive behaviors or actions that stem from anxiety or fear. In this context, an officer might find themselves constantly alert to potential threats, potentially compromising their ability to function effectively in their professional role or within their family dynamics.

Additionally, the other terms may not encompass the full depth of the behavior in question. "Isolating" refers to withdrawing from social interactions, which doesn't necessarily reflect the protective nature of the behavior described. "Rationalizing" involves justifying actions or thoughts with logical reasons, often to avoid confronting uncomfortable feelings, but this does not directly align with the concept of being overly protective. "Overreacting" indicates a response that exceeds the situation's demands, but it lacks the specific connotation of persistent focus and concern that "obsessing" entails. Thus, "obsessing" is the most appropriate term to describe an officer's heightened protective behavior towards their family.