A nurse is teaching the staff about a nursing theory that views a person, family, or community developing a normal line of defense. Which theory is the nurse describing?

Choice A reason: The ego defense model, rooted in psychoanalytic theory, describes psychological mechanisms (e.g., denial) to cope with stress, not a normal line of defense for health. It focuses on mental protection, not holistic wellness, making it unrelated to the nursing theory described with a line of defense. Choice B reason: The immunity model is not a recognized nursing theory. While immunity relates to biological defense, it does not encompass a “normal line of defense” for person, family, or community health. This choice is incorrect, as it lacks the holistic framework described in the question. Choice C reason: Pender’s Health Promotion Model focuses on behaviors to enhance health but does not use the concept of a normal line of defense. It emphasizes individual motivation and barriers, not systemic protection against stressors, making it an incorrect match for the described nursing theory. Choice D reason: The Neuman Systems Model views individuals, families, or communities as systems with a normal line of defense, a protective barrier against stressors. This holistic theory emphasizes maintaining stability through primary, secondary, and tertiary prevention, aligning with the described concept, making it the correct theory.