Final answer:
The health care team member who is allowed to diagnose, prescribe medications, and perform surgery is the veterinarian.
Step-by-step explanation:
The health care team member who is allowed to diagnose, prescribe medications, and perform surgery is the veterinarian. Veterinarians are professionals who are trained to provide medical care for animals. They have the knowledge and expertise to diagnose illnesses and injuries, prescribe appropriate medications, and perform surgical procedures.