Toads, like other amphibians, use buccal respiration as one of their primary methods of gas exchange. This process involves the rhythmic raising and lowering of the floor of the mouth (buccal cavity) to draw air in through the nostrils. Gas exchange occurs directly through the moist, vascular lining of the mouth and throat.

B. Tilapia: Being a fish, primarily uses gills for respiration.

C.Birds utilize a complex system of lungs and air sacs. They do not rely on the lining of their mouth for gas exchange.

D. Grasshopper: Grasshoppers are insects that breathe through a tracheal system. Air enters through small openings called spiracles