Why do we shiver when it is cold? A. It is the brain stimulating the person to move to a warmer location.
B. It is an involuntary reaction that does not actually help our body.
C. The rapid twitching of the muscles generates heat.
D. It is a side-effect of the pancreas signaling to the brain that it is losing heat.

C. The rapid twitching of the muscles generates heat.

Explanation:

When the body detects that it is cold, it will shiver in an attempt to create heat.

The rapid loosening and tightening of the muscles in this process creates heat.

This is a involuntary and natural response that helps return the body back to homeostasis and maintain a normal temperature.

So, the correct answer is C. The rapid twitching of the muscles generates heat.

C.  The rapid twitching of the muscles generates heat.

Explanation:

When someone feels cold, tiny sensors in your skin send messages to your brain telling you that you need to warm up.