(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii), (e)-(ii), f(vi).

Yeast : Alcohol

Yeast get energy through anaerobic respiration. They are known as anaerobes. In the absence of oxygen, glucose breaks down into alcohol and carbon dioxide.

Diaphragm : Chest cavity

A large, muscular sheet called diaphragm forms diaphragm the floor of the chest cavity. The movement of the diaphragm and the rib cage are involved in the breathing.

Skin : Earthworm

The skin of earthworm is moist and slimy through which they respire.

Leaves : Stomata

The leaves of the plants have tiny pores called stomata for exchange of oxygen and carbon dioxide.

Fish : Gills

Fishes respire through gills. Gills are projections of the skin.

Frog : Lungs and skin

Frogs have pair of lungs for respiration, they also respire through their skin which is moist and slippery.