You are presented with the question "What has a nervous system?" and the following answer choices: 
- Nerve tonic
 - Jellyfish
 - Air
 - fur seals
 - Cardiovascular system
 - animals
 - chickens
 - elephants

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


 

  Jellyfish       