complete the paragraph by choosing the appropriate words given in the brackets :
Class Amphibia consist of animals which are strictly ......... only during their larval stages.At that time they breathe through their ..........Tadpoles are such stages which later ......... to form adult frog. Adult frog respires with the help of ................... when in water and with .................. when on land. Thus, it is a true .......... For performing cutaneous respiration, i.e. respiration through skin, they lack .......... in any form. The skin is also kept moist by staying near the water bodies. Amphibians do not have a ......... but eyes are bulging and prominent, this solves the problems of vision.