In what three ways are the three groups of amphibians similar and different?

Amphibians are typically divided into three groups: frogs and toads (Anura), Salamanders and Newts (Urodela), and caecilians (Gymnophiona). All three groups share the ability to live both in water and on land during different life stages, possess moist skin for respiration, and undergo metamorphosis. However, they differ in body structure; frogs and toads usually have a more robust body and long hind legs for jumping, salamanders have elongated bodies and tails with limbs, while caecilians are limbless, resembling snakes or worms. Additionally, their reproductive strategies vary, with frogs and toads often laying eggs in water, while some salamanders can lay eggs on land, and caecilians exhibit internal fertilization.