Fact 1: Most invertebrates have a more complex nervous system.

Fact 2: Jellyfish and insects are invertebrates.

Given the two facts above, answer the question "What has a more complex nervous system?" with the following options: 
- elephants
 - phytoplankton
 - animals
 - insects
 - viruses
 - crocodiles
 - tortoises
 - bacteria


 

    insects     