birds with beaks of different shapes eat different foods. Why would some birds have beaks that look a lot different than those of other birds? ['some of the birds eat worms and the other birds have blue feathers', 'some of the birds of the same species have lived in a zoo all their lives', 'some of the birds take seeds for nourishment and the others look for dead animals for nourishment', 'some of the birds like to file down their beaks']