You are presented with the question "What unwanted creature would be found on the surface of a human body using it as a host? " and the following answer choices: 
- Tapeworm.
 - Leeches.
 - Pesticides
 - animals
 - insects
 - Hookworm
 - bacteria
 - Bracelet.

Now knowing that some parasites live on the surface of their host and leeches are external parasites, choose the best answer.


 

  Leeches.       