You are presented with the question "what must happen for water vapor to move from plants into the atmosphere?" and the following answer choices: 
- plant must be dead
 - Condensation
 - stomates must be open
 - evaporation
 - cells must be closed
 - must be cloudy
 - Warm air moving into cold air
 - vaporization

Now knowing that transpiration is when water vapor moves from plants into the atmosphere and transpiration occurs as long as stomates are open, choose the best answer.


 

   stomates must be open      