Question

Which of the following birds lives in the polar region?
(A)

(B)

(C)

(D)

Answer 1

Hint The organisms living in unusual habitats like the polar region need special adaptations to survive in such harsh and cold habitats. Without these unique adaptations, no organism can live in such a habitat.

Complete answer:
From the given birds, only penguins can live and survive in the polar region. As the polar region is not a very convenient place to live in, they possess certain specialized adaptations that help them to survive in the harsh habitat. They have countershaded dark and white plumage and flippers for swimming that help them to camouflage as well and a very thick layer of insulating feathers that keep them warm in the water. Thus, with the help of their specialized body structure, they maintain to survive in their habitats which are mainly Antarctica but some live in the temperate zone such as the Galápagos Islands.

Additional Information:
Here's some information about the other birds mentioned in the question:
Sparrow: These are small passerine birds found mostly in North America, Australia, Southern, and eastern Africa, and populated areas of South America. They nest on buildings and the house and some of them like Eurasian tree Sparrow inhabit cities. They are short, plump, birds with short tails and stubby powerful beak and found in brown and grey color.
Hen: Hen is the female of chicken which is one of the most common and widespread domesticated fowls and their number in the world is higher than any other bird and domesticated fowls. They are rated as a source of eggs or their meat. Studies suggest that they have multiple maternal origins in South Asia, Southeast Asia, and East Asia but their natural group found in the Americas, Europe, and the Middle East, and Africa originating in the Indian subcontinent.
Eagle: These are large birds of prey found mostly in Eurasia and Africa as well as a few species in North America, Central, and South America, and Australia. They are divided into four types- Fish Eagles, booted eagles, Snake eagles, and Harpy eagles.

So, the correct answer is “penguin”.

Note: Penguins are aquatic flightless birds as their adaptations suggest, they can swim fluently in the water just like other birds fly in the air. They spend roughly half of their life on land and the other half in water and are found mainly in cold climates but some live in the temperate zones as well. The larger ones inhabit the colder regions whereas the penguins found in temperate regions are mainly the smaller ones.