Cellulose. Our bodies as humans lack enzymes to break the cellulose down.
The best answer to fill in the blank would be B) Small intestine or the second option.
Answer:
it's D. I believe anyways is it if you can pick two pick A,D, or D and C who knows at this point
sorry I'm not much help but I hope it did something
<span>At the base of Arthropoda.</span>
