Which of the following is an example of extraordinary treatment?

Extraordinary treatment refers to medical interventions that are not considered ordinary or standard care, often involving significant risk, complexity, or potential for severe side effects. Performing surgery is a quintessential example of extraordinary treatment because it is an invasive procedure that typically changes the patient's physical body and can involve considerable recovery time, potential complications, and ethical considerations surrounding the necessity and risks associated with surgery.

On the other hand, providing hydration, feeding a patient, and administering comfort care are often seen as standard forms of care that maintain basic human dignity and encourage comfort rather than altering the course of a serious medical condition complexly or invasively. These options generally do not carry the same level of risk or ethical debate as surgical procedures, making them less representative of extraordinary treatment.