Fact 1: Most invertebrates have a nervous system.

Fact 2: Jellyfish and insects are invertebrates.

Given the two facts above, answer the question "What has a nervous system?" with the following options: 
- fur seals
 - Jellyfish
 - Rocks
 - chickens
 - animals
 - Air
 - h2o
 - elephants


 

  Jellyfish       