You are presented with the question "what sees a positive impact on root growth due to looseness of soil?" and the following answer choices: 
- Roundworms
 - Conifers
 - humans
 - h2o
 - orchids
 - Earthworms
 - mussels
 - teeth

Now knowing that the looseness of soil has a positive impact on a plant 's roots' growth in that soil and many orchids are rewarding indoor plants, choose the best answer.


 

     orchids    