OPTIONS:
[a]. sharks
[b]. sperm cells
[c]. an organism's body
[d]. adult sponges
[e]. critical organs
[f]. humans
[g]. gastropod shells
[h]. all matter
Q: Fact 1: Adult sponges are sessile. Fact 2: Sessile Attached permanently, immobile. Given the two facts above, what are immobile?
A:
[d].