The right answer is: Kingdom Plantae
The term "plants" includes plant organisms, mostly terrestrial, consisting of an upper leafy stem and anchored (planted) in the soil.
Plantae kingdom contains only non-motile multicellular nucleated organisms.
Not all of the Animalia are non-motile (spermatozoids and some immune cells are mobile).
Protista Are unicellular organisms, not multicellular.