As farmers use the land, it often changes from arable land to desert. This process is known as
       
      
                
     
    
    
    
    
    2 answers:
            
                    
              
              
                
                
B  Intensive farming depletes the nutrients in the soil.  That's why we are suppose to rotate crops and give the land a rest every 7 years. 
                                
             
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The inner core is mainly made up of hot metals
        
             
        
        
        
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conservation, international agreements, managed use,
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The answer is D. Ecosystems experience change through human activity and natural events
        
             
        
        
        
Answer:The answer is 1,3,6 
Explanation