in china, there is a family limit for only having 1 child
at 10 billion people on earth, we will most likely run out of food supply
 
        
                    
             
        
        
        
It is very difficult for an atom to accept a proton. It can only be done under very special circumstances. So A and C are both incorrect. I don't see how D is possible. The atom does lose 1 electron, but how it gets 21 is think air.
The answer is B which is exactly what happens.
 
        
                    
             
        
        
        
Answer:
Iron deficiency 
Explanation:
or more scientifically explained as decreased hemoglobin levels in your blood but still caused by lack of iron. 
 
        
                    
             
        
        
        
Answer:
When same-sized team members are placed on each side of the rope, the sizes of the arrows on both sides remain the same.
Explanation:
This is the answer on Plato
 
        
                    
             
        
        
        
Y-STR analysis. It is a DNA test used to compute and match with the possibility via lap.