You are presented with the question "Healthy roots can be due to what aspect of soil?" and the following answer choices: 
- less water
 - dryness
 - growth
 - climate
 - looseness
 - nutrients
 - roughness
 - compact

Now knowing that the looseness of soil increases the amount of oxygen in that soil and oxygen in the soil is vital for healthy roots, choose the best answer.


 

     looseness    