All of the following characteristics apply to these sea anemones except:
a. they are free swimming.
b. they are radially symmetrical.
c. they have tentacles with stinging cells.
d. they have one opening into their digestive system.

a. they are free swimming.

Explanation:

Sea anemones (Actinariums), part of of the phylum Cnidaria, are found in the majority of the world's seas and oceans.

Sea anemones can convey an excruciating sting to humans and different creatures unfortunate enough to come into contact with one. These animals stick to rocks and don't usually tend to move.

don't enter the room

explanation:

or you can just ask him to move away from his house

i feel like it is actually b.