Arthropods are the largest phylum of invertebrates, and invertebrates are animals without a backbone. Given these facts, what are arthropods the largest phylum of among the following options:
- 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


 

  animals without a backbone       