A resident's legal guardian has the right to sign a ____________ on behalf of the resident.

A resident's legal guardian indeed has the right to sign a Do Not Resuscitate (DNR) order on behalf of the resident. A DNR order is a specific medical directive that indicates a patient's preference regarding resuscitation in the event of cardiac arrest. This decision is typically made in consultation with medical professionals and reflects the wishes of the resident regarding their end-of-life care, ensuring that their autonomy is respected even if they are unable to communicate their preferences.

In many jurisdictions, including New Jersey, it's recognized that a legal guardian, as a person authorized to make decisions on behalf of the resident, can provide consent for such medical orders. This role underscores the importance of having a clear and legally recognized guardian to interpret and implement the resident's wishes regarding medical treatment, especially in critical situations.

Other options, while potentially relevant in different contexts, do not pertain to life-sustaining decisions in the same way a DNR does. Consent forms and medical release forms typically relate to obtaining permission for treatment or sharing medical information, while an affidavit is a written statement confirmed by oath, primarily used in legal contexts rather than medical decision-making.