What explains why a bone in birds wing is homologous to lizards front leg?

Homology explains why a bird's wing bone is homologous to a lizard's front leg. Homology is when two or more features or structures come from the same evolutionary ancestor in the phylogenetic history. Birds and lizards share a common ancestor that had front legs. Over time, birds evolved wings while lizards retained their front legs. Even though their structures and functions may differ vastly, they developed from the same fundamental biological structures, indicating shared historical connections.