Homeo- comes from a greek word means still the suffix stasis comes from "stoppage" or "standstill" how does this relate to homeostasis

"Homeostasis" is the regulation of internal environment. It can be perceived as "same standstill" when translating the prefix and suffix. The word really does fit as it's describing the action of changing things inside your body to keep up with the environment, examples including sweating to cool off and shivering to warm up.

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.