Answer;
Kingdom plantae.
Explanation;
Kingdom plantae is a classification kingdom made up of eukaryotic, multicellular organisms that have cell walls made mostly of cellulose.
They have pigments (chlorophyll) that absorb light, and that supply energy and oxygen to themselves and to other life-forms through photosynthesis
They are Eukaryotes, multicellular, autrotrophs, and have cell walls are made of cellulose, and are also producers in an ecosystem.