Why we shiver during winter months?

Explanation

### Step-by-Step Solution:

1. **Understanding Shivering**: Shivering is an involuntary response that occurs when our body is exposed to cold temperatures. It is a mechanism to generate heat.

2. **Muscle Contraction**: During shivering, our muscles contract rapidly and repeatedly. This contraction requires energy.

3. **Energy Transformation**: The energy used for muscle contraction is transformed into heat. This process is crucial because it helps to raise the body temperature.

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