Final answer:
A nurse assessing host factors in the epidemiologic triad would likely focus on 'worker's family,' which encompasses individual characteristics influencing health, as opposed to environmental or occupational factors.
Step-by-step explanation:
In the context of the epidemiologic triad, when assessing host factors, a nurse would focus on the characteristics of the person that could influence their exposure, susceptibility, or response to a communicable agent. Among the options given, worker's family would most likely be assessed as a host factor, since it relates to the individual's personal life and could include aspects like genetic predispositions, immune system status, age, health history, and behavior patterns that influence risk. Factors such as crowding, shift work, and chemical exposure are more closely related to environmental or occupational aspects rather than personal host factors.