You are presented with the question "Conserving water can be used for survival in which region?" and the following answer choices: 
- cactuses
 - watershed
 - river
 - stability
 - desert
 - lake
 - rainforest
 - Pacific

Now knowing that conserving water can be used for survival in a dry environment and by definition, deserts are dry areas, choose the best answer.


 

     desert    