Solution (c) painting is protected by its frame similarly a book is protected by its cover.

Solution (b) destruction is caused by war and disease is caused by insects

Solution (d) to keep a check on theft police is required and to keep a check and store water Dams are built.

Solution (a) employees charge salary for their work and money lender charge interest for the money they lend.

Solution (c) gravity is related to its pull while magnetism is related to attraction.

Solution (d) traveler undertakes a journey while a sailor undertakes a voyage.

Solution (a) ink flows in pen and blood flows in vein.

Solution (b) the first and the third letters have interchanged their positions so the answer will be LATE.

Solution (c) the river flows while the pond is stagnant.

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