You are presented with the question "what is freshwater habitats that contain little or no salt?" and the following answer choices: 
- Animal survival
 - allow growth
 - weathering
 - atmosphere
 - loose soil
 - ecosystems
 - salt and water.
 - oceans

Now knowing that freshwater biomes have water that contains little or no salt and biomes are global ecosystems, choose the best answer.


 

      ecosystems   