A. Frogs and toads have external fertilization whereas salamanders and caecilians have internal fertilization.
B. Frogs, toads, and most salamanders have four legs whereas caecilians are legless.
C. Frogs and toads lay eggs whereas some caecilians lay eggs and others give birth to live young.
D. Salamanders and caecilians have external tails whereas frogs and toads do not.
E. Adult frogs, toads, and salamanders are predators of insects and other small animals whereas caecilians are herbivores.
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