what are amphibians

Amphibians are a class of cold-blooded vertebrates that include frogs, toads, salamanders, newts, and caecilians. They are small vertebrates that need water or a moist environment to survive. Amphibians have a unique life cycle, starting as aquatic larvae with gills and then transforming into adults that live on land. They are known for their ability to breathe and absorb water through their thin skin. Most amphibians undergo metamorphosis, where they develop limbs and lungs before transitioning to land. They are important in nature as both predators and prey, and they play a crucial role in maintaining the balance of ecosystems. However, amphibians are also highly susceptible to environmental threats, and their populations are declining worldwide, with many species facing the risk of extinction