You are presented with the question "What might puppies and kitties have?" and the following answer choices: 
- They have thick fur
 - leeches
 - Animal fur
 - fur and fat
 - sensory neurons
 - parasitic snakes
 - crickets
 - parasitic worms

Now knowing that roundworms may be free-living or parasitic and roundworms Nearly all puppies and kittens have roundworms, choose the best answer.


 

        parasitic worms 