Fact 1: Invertebrates are animals that lack a vertebral column, or backbone.

Fact 2: Snails and slugs are invertebrates.

Given the two facts above, answer the question "What lack a vertebral column?" with the following options: 
- snakes
 - cacti
 - eels
 - insects
 - Conifers
 - ferns
 - fish
 - snails


 

        snails 