Fact 1: Most invertebrates have a more complex nervous system. Fact 2: Jellyfish and insects are invertebrates. Given the two facts above, what has a more complex nervous system?
Choices: [i] elephants. [ii] phytoplankton. [iii] animals. [iv] insects. [v] viruses. [vi] crocodiles. [vii] tortoises. [viii] bacteria.
[iv]