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: 
- Plaster
 - animals
 - fur seals
 - elephants
 - chickens
 - Rocks
 - Oxygen
 - Jellyfish


 

        Jellyfish 