Some parasites live on the surface of their host, and leeches are external parasites. Given these facts, what unwanted creature would be found on the surface of a human body using it as a host?  among the following options:
- Tapeworm.
 - Leeches.
 - Pesticides
 - animals
 - insects
 - Hookworm
 - bacteria
 - Bracelet.


 

  Leeches.       