99% Sure its A. Transpiration
        
                    
             
        
        
        
Answer:
D.
Explanation:
I think its D. sorry if its wrong 
 
        
             
        
        
        
According to simple diffusion. Molecules travel from high concentration to low. So it would be traveling into the cornea
        
             
        
        
        
He was studying genetics by performing mating crosses in pea plants. Then, he discovered  that the traits in the offspring didn't always match the traits in the parental plants.