Fact 1: Some parasites kill their host, but most do not.

Fact 2: Humans are the unfortunate hosts of the deadly parasite.

Given the two facts above, answer the question "What parasites kill their human, but some do not?" with the following options: 
- friendly
 - deadly
 - animals
 - gentle
 - safe
 - harm them
 - goats
 - reproduce


 

  deadly       