You are presented with the question "What lack a vertebral column?" and the following answer choices: 
- snakes
 - cacti
 - eels
 - insects
 - Conifers
 - ferns
 - fish
 - snails

Now knowing that invertebrates are animals that lack a vertebral column, or backbone and snails and slugs are invertebrates, choose the best answer.


 

        snails 