Why do cells differentiate during development?

Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types. ... Differentiation dramatically changes a cell's size, shape, membrane potential, metabolic activity, and responsiveness to signals.

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.

not too sure but maybe in the hot springs.