Final answer:
The terminal at Bilbao airport is nicknamed "La Paloma" due to its resemblance to a pigeon, not an eagle, swallow, or seagull.
Step-by-step explanation:
The terminal at Bilbao airport is nicknamed "La Paloma" which translates to 'the dove' in English. This nickname is due to its resemblance to a bird. The correct answer to which bird the terminal resembles is D) Pigeon. This comparison is based on the smooth, curved structures of the airport's design that evoke the shape of a pigeon. Despite the structural differences in birds, such as between a penguin and a seagull where a penguin uses wings to swim and a seagull uses wings to fly, the architectural aesthetics of the Bilbao airport terminal specifically draw on the form of a pigeon. The terminal at Bilbao airport is nicknamed "La Paloma" due to its resemblance to a pigeon, not an eagle, swallow, or seagull.