Amphibia is a class of animals that includes frogs, toads, salamanders, and newts. These creatures are known for their unique life cycle, which typically involves both aquatic and terrestrial stages. Amphibians are cold-blooded and have moist skin, which they use for respiration in addition to lungs. Amphibians play a crucial role in ecosystems as both predators and prey. They are sensitive to environmental changes, making them important indicators of ecosystem health. Unfortunately, many amphibian species are threatened by habitat loss, pollution, and disease, highlighting the need for conservation efforts to protect these fascinating animals.