Final answer:
Shivering to raise body temperature is an example of the body maintaining homeostasis via a negative-feedback mechanism, which reverses the direction of change.
Step-by-step explanation:
Shivering to try to raise your body temperature back to normal would be an example of the body trying to maintain homeostasis. This is a process in which the body's internal environment is kept stable, despite external changes. So, when you shiver in response to cold, your muscles produce heat, aiding in the return of body temperature to a set point. This is known as a negative-feedback mechanism, not a positive-feedback one. In a negative feedback loop, the system responds in such a way as to reverse the direction of change. Since this process helps to maintain the body's stable internal conditions, it is a classic example of negative feedback.