* Ciliophora (ciliates)

* Sarcodina (amoebas)

* Zoomastigina (flagellates)

* Sporozoa (sporozoans)

So, the answer to your question depends on what options you have.

For example, if your options are:

* Ciliophora

* Sarcodina

* Zoomastigina

* Porifera

Then the answer would be Porifera. Porifera are sponges, which are multicellular animals, not protists.

Please provide the options you have, and I can help you determine the correct answer.