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        | A wide grassy plains region in central Argentina.  P212 |  
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        | A partially enclosed body of water where salty seawater and freshwater mix.  P213 |  
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        | The loss of soil nutrients needed by plants.  P214 |  
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        | Huge slums that surround some Brazilian cities.  P217 |  
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        Term 
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        Definition 
        
        | A system in which Spanish monarchs gave land to Spanish colonists in the Americas; landowners could force Indians living there to work the land.  P219 |  
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        | A trade organization that includes Argentina, Brazil, Paraguay, Uruguay, and two associate members (Bolivia and Chile).  P222 |  
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        Definition 
        
        | Completely surrounded by land, with no direct access to the ocean.  P224 |  
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