Direction: Sequence the sentences and enter as a digit string (e.g. "53412").
1. What is more shocking to observe is how often such strokes lead to death.
2. When the body temperature rises, our vital organs swell, and this causes death.
3. One main reason for this is that people underestimate how badly heat can affect the body.
4. Heat strokes have become more common in our country than ever before.