(a) butterfly - (iii) spiracles

spiracles are the small pores present on the lateral surface of the body. They are the organs of respiration in insects.

(b) earthworm - (iv) skin

The earthworm respires through the moist and slimy skin which facilitates the transfer of oxygen and carbon dioxide.

(c) sparrow - (i) lungs

lungs are the most advanced but complex respiratory structures mostly found in well-developed birds, reptiles and mammals.

(d) fish - (ii) gills

gills are the covering of the skin which help the fishes take up dissolved oxygen in water.