You are presented with the question "what are arthropods the largest phylum of?" and the following answer choices: 
- Something to move
 - animals without a backbone
 - Earth orbiting the Sun
 - microorganisms
 - absorb light energy
 - converting mass to energy
 - Generating heat
 - remains of prehistoric life

Now knowing that arthropods are the largest phylum of invertebrates and invertebrates are animals without a backbone, choose the best answer.


 

  animals without a backbone       