One kingdom is not named in the graphic. it contains the most ancient bacteria that live in extreme environments. examples include: halophiles and methanogens. to which kingdom do these belong?

the answer is Kingdom Archaebacteria

***more closely related to Eukaryotes than to bacteria, cells walls without peptidoglycan, found in harsh environments, subdivided into 3 groups based on their habitat (methanogens, thermoacidophiles, and extreme halophiles)

Explanation:

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.