The answer is A or maybe D but mostly A
Sponges don't have internal organs. They don't have muscles, a nervous system, or a circulatory system. Their walls are lined with many small pores called ostia that allow water flow into the sponge. ... Sponges are able to get microorganisms such as algae and bacteria for food through openings.
Answer:
An organism has the following characteristics: cell wall, autotrophic, unicellular, and eukaryotic. The organism belongs to kingdom Protista.
Explanation:
