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:
- humans
 - absorb light energy
 - converting mass to energy
 - fish
 - animals without a backbone
 - remains of prehistoric life
 - h2o
 - Earth orbiting the Sun


 

     animals without a backbone    