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

Fact 2: Parasites are organisms which live off a host.

Given the two facts above, answer the question "Some what which live off a host kill it, but most do not?" with the following options: 
- offspring
 - pets
 - poisons
 - fungi
 - Leptospirosis
 - bacteria
 - animals
 - organisms


 

        organisms 