Please choose the correct answer to the question: Why would some birds have beaks that look a lot different than those of other birds?

Answer1: some of the birds eat worms and the other birds have blue feathers Answer2: some of the birds of the same species have lived in a zoo all their lives Answer3: some of the birds take seeds for nourishment and the others look for dead animals for nourishment Answer4: some of the birds like to file down their beaks

Answer format: answer1/answer2/answer3/answer4