In which animal,does the diaphragm have no role in respiration?

What is the site of gaseous exchange in an insect?

Amphibians respire through ........

Which of the following organisms obtain dissolved oxygen from water by diffusion through their body surface during respiration?

Choose the correct option by matching the organisms in Column-$I$ with their respective respiratory organs in Column-$II$.

Column-$I$	Column-$II$
$(p)$ Sponges	$(I)$ Through tracheal tubes
$(q)$ Insects	$(II)$ Through lungs
$(r)$ Molluscs	$(III)$ Vascularized gills
$(s)$ Reptiles	$(IV)$ Simple diffusion over their entire body surface
	$(V)$ By their moist cuticle

Find the correct sequence for $p-q-r-s$.

In insects,respiratory gas exchange occurs through