Cancer Cells 
EXPLANATION: cancer cells do not respond to the signals that regulate the growth of most cells. Cancer cells,divide uncontrollably and form masses of cells called tumors that can damage the surrounding tissues
        
             
        
        
        
Gene flow does not promote speciation, whereas season of fertility, natural selection, and genetic drift do. 
        
                    
             
        
        
        
Answer:
 Children born to mothers with dark skin, living far from the equator.
Explanation:
I would say this is the answer but I'm not sure. This is just what I think. I asked my mom about it and she said the same thing I did. I hope this helps.