What unwanted creature would be found on the surface of a human body using it as a host? 
Options:
- (A) Tapeworm.
- (B) Leeches.
- (C) Pesticides
- (D) animals
- (E) insects
- (F) Hookworm
- (G) bacteria
- (H) Bracelet.
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
Some parasites live on the surface of their host. Leeches are external parasites. Leeches are on the surface of the host . The answer: (B).
What unwanted creature would be found on the surface of a human body using it as a host? 
Options:
- (A) Tapeworm.
- (B) Leeches.
- (C) Pesticides
- (D) animals
- (E) insects
- (F) Hookworm
- (G) bacteria
- (H) Bracelet.
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
user
Some parasites live on the surface of their host. Leeches are external parasites. Leeches are on the surface of the host . The answer: (B).
assistant
What unwanted creature would be found on the surface of a human body using it as a host? 
Options:
- (A) Tapeworm.
- (B) Leeches.
- (C) Pesticides
- (D) animals
- (E) insects
- (F) Hookworm
- (G) bacteria
- (H) Bracelet.
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
Some parasites live on the surface of their host. Leeches are external parasites. Leeches are on the surface of the host . The answer: (B).