You are presented with the question "Paralytic shellfish cause harm to what?" and the following answer choices: 
- their environment
 - most cephalopods
 - their ecosystem
 - themselves
 - coral reefs
 - animals
 - living things
 - circulatory systems

Now knowing that poison causes harm to living things and poisoning is similar to paralytic shellfish poisoning , choose the best answer.


 

       living things  