Final answer:
The subject of this question is Medicine, and it pertains to legal documents used to express medical treatment preferences.
Step-by-step explanation:
The subject of this question is Medicine. In the context of the question, the terms Physician Order for Life-Sustaining Treatment (POLST) and Medical Order for Life-Sustaining Treatment (MOLST) refer to legal documents that individuals can create to express their preferences for medical treatment in case they become incapacitated or unable to communicate their wishes. These documents outline specific interventions a person wants, such as Do Not Resuscitate (DNR) orders and instructions about life-extending treatments.