Which unit of organisms evolves- an individual, a population, or a species? explain.

A population, because the individuals in a population will interbreed with mutations, and with time the mutations will breed and evolve.

a species

explanation: when darwin studied the birds in that one island he found that there were DIFFERENT species of the bird they evolved to fit their needs such as the beaks were shorter or smaller depending on what each species of the bird ate mostly

no clue honey ima just get a life and go home

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.