You are presented with the question "Where is conserving water useful for survival?" and the following answer choices: 
- abalone
 - desert
 - marshland
 - cactuses
 - earth
 - wetlands
 - river bank
 - watershed

Now knowing that conserving water can be used for survival in a dry environment and most of the southwest is semi desert and very dry, choose the best answer.


 

  desert       