Fact 1: The looseness of soil has a positive impact on a plant 's roots' growth in that soil.

Fact 2: Many orchids are rewarding indoor plants.

Given the two facts above, answer the question "what sees a positive impact on root growth due to looseness of soil?" with the following options: 
- Roundworms
 - Conifers
 - humans
 - h2o
 - orchids
 - Earthworms
 - mussels
 - teeth


 

     orchids    