Fact 1: When the body is hot , sweat is produced to cool the body.

Fact 2: Athletes risk dehydration because of excessive sweat loss.

Given the two facts above, answer the question "What can happens when athletes are hot?" with the following options: 
- competition
 - freezing
 - heating liquids
 - dehydration
 - vaporization
 - it can be seen
 - second-degree burns
 - melting


 

    dehydration     