You are presented with the question "Roundworms can be free-living or live on a what?" and the following answer choices: 
- soil
 - nest
 - host
 - root
 - stem
 - habitat
 - food
 - commune

Now knowing that roundworms may be free-living or parasitic and parasites Shortfin makos host a variety of parasitic copepods, choose the best answer.


 

   host      