The answer is D.) 95%
Vertebrates are animals that have backbones. Invertebrates, logically, are animals lacking backbones :P
Given that fact, try thinking of an animal. Almost any animal that comes to mind has a backbone XD Given that thought, vertebrates make up more than 90% of the animal kingdom.
Thank you for your question! I hope this helped! Have an amazing day and feel free to let me know if you need any further help! :D
