Some of the physiographic features that cause extreme aridity may be found together within a <span>single desert, but t</span>he deserts found in the western united states are primarily the result of being located within the rain shadow of one or more mountain ranges. 
        
             
        
        
        
Answer:
She's trying to enrich the soil with nutrients. 
Hope this helps & good luck! 
Feel free to message me if you need more help! :)
 
        
                    
             
        
        
        
I believe that would be a palindrome.
        
             
        
        
        
Answer:
A portion of the lithosphere in which the functional interstices of permeable rock or earth are not filled by water under hydrostatic pressure.
In your own words::
Well’s use is permanently discontinued or if it is in a condition that makes it uneconomic to repair. 
Explanation:
hope this helps </3
 
        
             
        
        
        
The correct answer is - Amazon Basin.
The northern half of Brazil is dominated by the Amazon Basin. This basin is formed by one of the longest rivers in the world, the Amazon River, which is also the river that has the highest amount of water in it. It lies in the middle of the Amazon Basin, cutting it in half, and in certain parts of the year flooding parts of it. This basin is covered by tropical rainforest, in fact the largest tropical rainforest in the world, the Amazon rainforest. It is an area dominated by lowlands and small hills, cut by thousands of smaller and larger rivers, all of which are tributaries to the largest one, the Amazon River. This basin is also the place on the planet that has the highest biodiversity in the world of plants or animals.