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.
A:
orchids