You are presented with the question "What has a nervous system?" and the following answer choices: 
- Plaster
 - animals
 - fur seals
 - elephants
 - chickens
 - Rocks
 - Oxygen
 - Jellyfish

Now knowing that most invertebrates have a nervous system and jellyfish and insects are invertebrates, choose the best answer.


 

        Jellyfish 