Final answer:
A living will prevents certain types of health services as described in the will, such as resuscitation or being put on a respirator.
Step-by-step explanation:
Using a living will prevents certain types of health services, specifically those that are described in the will. A living will is a written legal document that details specific interventions a person wants or does not want in the event they become incapacitated and cannot express their wishes. For example, if a person includes a Do Not Resuscitate (DNR) order in their living will, it means that medical personnel are not to take steps to restart their heart or put them on a respirator if they cannot breathe on their own.