How do the limbs of lions bats and dolphins show that these animals came from the same ancestor?

The limbs of lions, bats, and dolphins exhibit homologous structures, which indicate they share a common ancestor. Despite their different functions—walking, flying, and swimming—the underlying bone structure is similar, with variations adapted to each animal's environment. This morphological evidence supports the theory of evolution, demonstrating how diverse forms can arise from a shared genetic heritage. Such anatomical similarities reflect evolutionary changes over time in response to different ecological niches.