Final answer:
A living will is a legal document that specifies a patient's preferences regarding future health care, including resuscitation and life-extending measures. It may include a health care proxy to make medical decisions on behalf of the patient.
Step-by-step explanation:
A living will is a legal written document that specifies a patient's preference regarding future health care, especially in relation to resuscitation and life-extending measures. It is a written legal document that details specific interventions a person wants, such as not wanting to receive life-extending treatments. A living will can also include a health care proxy, which appoints a specific person to make medical decisions for the patient if they are unable to speak for themselves.