Name four of the psychological parameters that should be monitored during surgery.

The focus on monitoring physiological parameters during surgery, as provided in the correct answer, is critical for ensuring the safety and well-being of the animal undergoing the procedure. These parameters—oxygen saturation, blood pressure, pulse rate, and body temperature—reflect the animal's physical state and are vital indicators of its physiological stability.

Oxygen saturation measures the amount of oxygen carried in the blood, which is essential during anesthesia to ensure that the animal is receiving adequate oxygen. Blood pressure is crucial for evaluating the cardiovascular system's stability, and abnormal readings can indicate potential complications. Monitoring pulse rate provides insights into the cardiovascular function, as excessive changes can signal stress or anesthesia-related issues. Body temperature is significant as it indicates metabolic function, and maintaining normothermia is essential during surgery to prevent complications related to hypothermia or hyperthermia.

While the other options contain important parameters for various aspects of animal monitoring, they do not encompass the core physiological indicators typically tracked during surgery, which primarily focus on the animal's immediate health status under anesthesia.