Answer:
B
Explanation:
I believe it is meiosis because there are two parts in which it helps to increase genetic variety. In prophase 1, the genes cross over, which increases the variety. Also, the chromosomes are assigned randomly in Metaphase 1.
Hope this helps:)
 
        
                    
             
        
        
        
None of the above because they are non pollutant
        
             
        
        
        
Answer:
A I think I might be wrong but hopefully its right
 
        
             
        
        
        
bring change in the genetic basis of a population
 
        
                    
             
        
        
        
I am thinking D. But I am not sure that it is the answer.