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Answer:
Earth's magnetic field is created within Earth by the motion of liquid __________________ in Earth's _________________.
Explanation: iron; outer core
 
        
             
        
        
        
Answer: Young rivers are channels that are deeper than they are wide, have a very fast flow, and contain frequent waterfalls and rapids
 
        
                    
             
        
        
        
Speciation is b. the process by which new species are formed. They are often caused by the isolation of certain organisms in terms of environment or geographical area. This is part of the evolutionary changes that various species undergo to brought about by natural selection.