How do similarities in the bones of humans dolphins horses and birds provide an evidence for evolution?

The similarities in the bones of humans, dolphins, horses, and birds, known as homologous structures, suggest a common ancestry among these diverse species. Despite their different environments and lifestyles, the presence of similar bone structures indicates that they evolved from a shared ancestral form. This pattern of anatomical similarity supports the theory of evolution by demonstrating how species can diverge and adapt over time while retaining fundamental skeletal features. Such evidence contributes to our understanding of evolutionary processes and the relationships among various organisms.