Final answer:
Humans exhibit characteristics of being multicellular, heterotrophic, and having specialized cells without cell walls, categorizing them in Kingdom Animalia. Plants are autotrophic, multicellular organisms using photosynthesis, categorized under Kingdom Plantae. Accordingly, humans showcase the traits of Animalia, while bear and orchids fit into the categories of Animalia and Plantae respectively.
Step-by-step explanation:
Humans display all of the features common to the animal kingdom, which place us in the Kingdom Animalia. These features include being multicellular, heterotrophic (obtaining food by eating other organisms), and having cells that lack a cell wall, which allows for a greater diversity of cell types and function. Human beings, like other animals, reproduce sexually, have a high level of cell specialization, and show developmental stages from embryo to adult.
Plants, on the other hand, are categorized under the Kingdom Plantae. They are also multicellular but are autotrophic, primarily using photosynthesis to produce energy from sunlight. This kingdom's organisms have adaptations such as cuticles, stomata, and a vascular system, which allow them to live on land and cope with challenges such as water loss and obtaining nutrients.
From the resource provided, a bear would fall under Kingdom Animalia, as bears are multicellular organisms that get their energy through ingestion, whereas plants like orchids belong to Kingdom Plantae, turning sunlight into energy through photosynthesis. Fungi are a separate kingdom, comprised of organisms that absorb nutrients from their surroundings.