11.Which features adapt polar bears to live in extremely cold climate?
(i) A white fur, fat below skin, keen sense of smell.
(ii) Thin skin, large eyes, a white fur.
(iii) A long tail, strong claws, white large paws.
(iv) White body, paws for swimming, gills for respiration.
The features adapt polar bears to live in extremely cold climate are white fur, fat below the skin, a keen sense of smell.
Thus, option (i) is correct.