Which of these additional sentences could be inserted into this paragraph and would best align with the author’s overall purpose?
(1) The smallest species is the fairy penguin. It has blue wings, instead of the normal black wings. (2) The chinstrap penguin has a black row of feathers across his white chin. (3) Penguins live an average of fifteen to twenty years. (4) The king and emperor have similar orange markings on the sides of their heads. (5) Although both are large species of penguins, and their markings are similar, the emperor is the larger species.