When people or animals play and interact with information, they get smarter.
        
             
        
        
        
Answer 
HBA HBs
Explanation:
In some parts of Africa, up to 20% of the population are carriers of the sickle cell gene. This suggests that the trait must have a survival value. The carriers of the trait have a much lower susceptibility to malaria than normal individuals. This is because the malaria parasite survives very poorly in sickled red blood cells.
 
        
             
        
        
        
Answer:
Oxygen is reduced, gaining electrons and hydrogen ions. -second choice
 
        
                    
             
        
        
        
Answer:
Explanation:
In critical conditions since when a forest is cut down if it rains the land is not in a condition for trees to flourish since every time it rains you will see a flood devastating any plant that tries to grow.
 
        
             
        
        
        
Look to see if the compound is ionic or not, then follow the rules for prefixes and suffixes of the compound.