Solution : painting is protected by its frame similarly a book is protected by its cover.

Solution: destruction is caused by war and disease is caused by bacteria

The pattern is Cube of a number : Square of a number

3 x 3 x 3 : 3 x 3 = 27 : 9

Similarly, from the given options

4 x 4 x 4 : 4 x 4 = 64 : 16

 

Solution: Employees charge salary for their work and money lender charge interest for the money they lend.

Solution: gravity is related to its pull while magnetism is related to attraction.

Solution: traveler undertakes a journey while a sailor undertakes a voyage.

Solution: ink flows in pen and blood flows in vein.

Solution: As Petals are a part of a Flower, Pages are part of a Book

Solution: the river flows while the pond is stagnant.

Solution: A cat has a paw for moving around while a horse has hoof around its feet to move around.

An archaeologists have a complete knowledge of archeology while an ornithologist has complete knowledge of Birds.

Solution: peacock is the national bird of India while bear is of Russia.