Magnesium and calcium have similar chemical properties because they have the same number of electrons in their valence shells.
 
        
             
        
        
        
Ima guess right now and say that its due to what they bought was cheap
        
             
        
        
        
Answer:
Because there are plenty of jobs and their jobs are probably there. People would rather live in rural areas, but most are living in urban because they don't have a choice. 
Explanation: