Which group of organisms includes multicellular eukaryotes with cell walls?

Organisms in the kingdom Plantae are multicellular eukaryotes that have cell walls made of cellulose. They are characterized by their ability to photosynthesize and produce their own food using light energy, carbon dioxide, and water. 

The plant kingdom includes a diverse range of organisms such as mosses, ferns, gymnosperms, and angiosperms (flowering plants).

Animals (Animalia) are also multicellular eukaryotes, but they do not have cell walls. 

Protista and Monera are now considered outdated taxonomic groups, and their members have been reclassified into other kingdoms. Protista included a diverse group of unicellular or multicellular eukaryotes, while Monera included prokaryotic organisms such as bacteria.