Which kingdom does not include vertebrates or invertebrates but contains simple forms like amoebas?

The correct choice is Kingdom Protista, as it encompasses a diverse group of eukaryotic microorganisms, which includes amoebas, parameCIA, and algae. Members of this kingdom are typically unicellular or simple multicellular organisms that do not fit neatly into the categories of plants, animals, or fungi. Protista serves as a catch-all group for organisms that exhibit characteristics of eukaryotic cells but lack the complexities associated with more differentiated life forms.

In contrast, other kingdoms such as Fungi, Monera, and Plantae either comprise multicellular organisms or have a category that specifically includes vertebrates and invertebrates. Fungi, for example, are primarily multicellular (except for yeasts) and play different ecological roles, primarily as decomposers. Monera mainly includes prokaryotic organisms (like bacteria) and does not include amoebas, which are eukaryotic. Kingdom Plantae consists of multicellular organisms that engage in photosynthesis and do not encompass simple forms like amoebas. Thus, Kingdom Protista is unique in containing these simpler eukaryotic forms.