You are presented with the question "What infests nearly all puppies and kittens?" and the following answer choices: 
- insects
 - Nematoda
 - heat or cold
 - water
 - hay fever
 - bacteria
 - parasites
 - the flu

Now knowing that roundworms make up the phylum Nematoda and roundworms Nearly all puppies and kittens have roundworms, choose the best answer.


 

  Nematoda       