Answer:
Eukaryotes
Step-by-step explanation:
The protista are not classified under animal, plant or fungus category. They are mostly unicellular but some protists for example, algae are considered as muticellular. The multicellular protists like seaweed provides oxygen, food and shelter for various ecosystems under water. The seaweed is similar to a plant but not categorized under plantae kingdom as it is less complex as compared with plants.
They are generally heterotropic that means they gain energy by consuming other organisms. The protists can also obtain energy by photosynthesis that is heterotropic in nature.