The correct answer for the question that is being presented above is this one: "trumpet animalcules, are a genus of filter-feeding, heterotrophic ciliate protists, representative of the heterotrichs." Stentor is classified in the kingdom Protista. The features, both internal and external, should be considered, when classifying this organism trumpet animalcules, are a genus of filter-feeding, heterotrophic ciliate protists.
