B, because it is the correct answer because i took that test lol 
        
                    
             
        
        
        
I believe this difference in concentration of dissolved Particles from one location to another is called a concentration gradient.
        
             
        
        
        
Idk the genotype but I have to answer a question so
        
             
        
        
        
Answer:
It’s a change in gentic cells, or are missing extra chromosomes
Explanation: