Correct option is A
The relationship between "Penguin" and "Chick" is that a Chick is the young one of a Penguin. Similarly, the young one of a Duck is a Duckling.
· Joey refers to the young one of a kangaroo.
· Cub refers to the young one of a lion or bear.
· Kitten refers to the young one of a cat.
Thus, the correct answer is option (a) Duckling.