What type of skin do amphibians have?

Amphibians possess permeable skin, which serves several critical functions for their survival. This type of skin allows for the absorption of water and gases, which is vital since amphibians typically have a dual life cycle, spending part of their lives in aquatic environments and part on land. The permeable nature of their skin enables them to take in oxygen directly from the water when they are submerged, while also facilitating respiration through the skin when they are on land.

Additionally, the skin of amphibians secretes mucus that keeps it moist, enhancing their ability to breathe through the skin and preventing dehydration. This moisture is crucial for their survival in various environments, as it helps regulate their body temperature and maintain hydration levels. This characteristic of amphibian skin distinguishes them from other classes of animals, such as reptiles, which have scaly skin that serves a different function primarily related to water retention and protection from the environment.

The other options, while describing skin types that exist in the animal kingdom, do not accurately characterize amphibians. Rough skin may describe certain textures found in other species, thick skin could refer to some mammals, and scaly skin pertains predominantly to reptiles, which are adapted to terrestrial life and differ fundamentally from amphibians in their skin structure and function