Concept:Euglena possesses both plant and animal features, but its plant-like characteristics prevent it from being classified as an animal.Explanation:Amoeba and Paramecium are unicellular protozoans that feed like animals, so they are grouped as animal-like protists.Obelia is a colonial cnidarian and belongs to the Animal Kingdom.Euglena contains chloroplasts and can make its own food through photosynthesis, which is a characteristic of plants.Because of this plant-like mode of nutrition, Euglena is not classified as an animal.Answer:Euglena (Option C)