When the body is hot , sweat is produced to cool the body, and sweat is released from sweat glands beneath the skin, and as it evaporates, the skin is cooled. Given these facts, what is used to cool the body when it is hot among the following options:
- water vapor
 - element
 - salt and water.
 - heater
 - evaporation
 - fur and fat
 - aqueous solution
 - sheet


 

     evaporation    