A student infected by a common cold virus ran a low-grade fever. After a few days the student's temperature returned to normal and the student was free of cold symptoms. The fever served as?

The fever served as a physiological response to the infection, helping the body fight off the common cold virus. By raising the body's temperature, the immune system can enhance its activity, making it more effective at combating the virus. This temporary increase in temperature is a natural defense mechanism that aids in recovery. As a result, once the virus was cleared, the student's symptoms and fever resolved.