Answer:
Plantae. The organism has a cell membrane, a cell wall, and membrane bound nucleus/organelles, meaning that there is no doubt that it is a eukaryote. That takes out kingdoms belonging to the domains bacteria and archaea, as they do not have any membrane-bound organelles (yes, that includes ribosomes). There are many clues, but the giveaway is at cellulose. Plants primarily have cellulose in their cell walls, to be more specific. However, the kingdom would be Plantae.
