Final answer:
The legal responsibility of a nurse during postmortem care is placing ID tags on the shroud and ankle to maintain proper identification of the body, crucial for legal and ethical reasons.
Step-by-step explanation:
The student's question pertains to the legal responsibilities of a nurse during postmortem care. Among the options provided, the action that is a legal responsibility is d. Placing ID tags on the shroud and ankle. This is important for maintaining correct identification of the body, which is crucial for legal and ethical reasons, including during the transportation to the morgue or funeral home, as well as for the potential need for autopsy or organ donation processes. Other actions, such as placing the body in a normal anatomic position, removing tubes and soiled dressings, or washing the body, are aspects of postmortem care but are not considered legal responsibilities in the same way as ensuring proper identification is.