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

Fact 2: Corals, and invertebrates in general, are delicate creatures.

Given the two facts above, answer the question "What can have a more complex nervous system?" with the following options: 
- a fish
 - Birds
 - insects
 - coral
 - the Sun
 - ducks
 - rocks
 - air molecules


 

    coral     