Alternative B points to the birds - in this case a peregrine falcon. Birds are clothed in feathers, have a beak with which they eat, two legs and two wings. Most birds use their wings for flight although penguins, for example, use them for swimming, and some, such as the kiwi, do not use them for anything. The young of birds always hatch from eggs, and there is generally a great deal of parental care in the form of incubation and feeding the growing chicks.
