Which is a function of the cytoplasm
a. forms a barrier around the cell
b. transports materials within the cell
c. controls what materials will move into and out of the cell
d. provides the cell with energy to perform its other functions

the answer would be b

explanation:

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.