Regulation of opening and closing of stomata 
        
                    
             
        
        
        
I believe it’s A but I’m not too sure 
Reason; Warm air rises, and when it rises it becomes cooler. ... If the pressure of the surrounding air is reduced, then the rising air parcel will expand. The molecules of air are doing work as they expand. This will affect the parcel's temperature (which is the average kinetic energy of the molecules in the air parcel).
        
             
        
        
        
Hypertonic would be the correct answer, there is more solute making the cell let out more water, shrinking the cell, therefore being hypertonic.
        
             
        
        
        
Yeah no one is gonna read all if this lol
        
                    
             
        
        
        
Answer:
I did this and i got A. I got it correct so you should too.