Fact 1: Poison causes harm to living things.

Fact 2: Poisoning is similar to paralytic shellfish poisoning .

Given the two facts above, answer the question "Paralytic shellfish cause harm to what?" with the following options: 
- their environment
 - most cephalopods
 - their ecosystem
 - themselves
 - coral reefs
 - animals
 - living things
 - circulatory systems


 

       living things  