The correct answer is - involuntary contraction of the skeletal muscles.
Explanation:
Shivering or the chills that is involuntary action of body to maintain the homeostasis by controlling the body heat or maintaining body temperature it can cause by environmental change or the infection.
It is rapid involuntary contraction and relaxation of the skeletal muscles whenever body needs to produce heat when ti feels cold. Skeletal muscles are act as thermal effector in such cases.
Thus, the correct answer is - involuntary contraction of the skeletal muscles.
Its just a natural this that comes and happens. If this happens to you the best way to settle your mind is to just ask the person and get confirmation that they don’t and if they do find out why and settle the rumors!
