Final answer:
A health care proxy is a designated person who is accountable for making medical decisions on behalf of an individual who cannot make decisions themselves.
Step-by-step explanation:
A health care proxy is a legal document that appoints a specific person to make medical decisions on behalf of an individual if they are unable to make those decisions themselves. This designated person is called the health care proxy and is accountable for making choices related to the patient's healthcare. The health care proxy should be someone whom the individual trusts to make decisions in accordance with their wishes.