You should make sure yourself is stable enough to have and care for a child, have enough food for the child, a job/career, etc. There is many different answers to this
        
                    
             
        
        
        
Answer:
acquired immuno deficiency syndrome
 
        
                    
             
        
        
        
Cell division 
protein synthesis
growth and metabolism
        
                    
             
        
        
        
Stabilizing selection... I think it might be right if I'm wrong, sorry if I am.