Answer:
Protista Kingdom
Step-by-step explanation:
Protista consists of simple eukaryotic organisms that are made up of a single cell or composed of group of similar cells that can sustain in any environment terrestial, moist , water, as parasites, etc.
Plant like protists such as algae are able to produce food of their own while heterotrophic species such as fungis (slime molds) feed on decaying dead organic matter.
Hence, kingdom protista includes autotrophic and heterotrophic, unicellular and multicellular organisms.