If two cultures have similar myths but those are different in some way what statements is reasonable?

Statement: It is reasonable to assume that the two cultures had a common origin or shared stories through trade or migration.

When different cultures share similar myths, it often points to a shared history or some form of cultural exchange. They may have stemmed from a common ancestral culture or been introduced through trade routes, migrations, or other forms of cultural interaction. By comparing and analyzing these variations in myths, scholars can gain insights into the connections and influences between cultures across different regions and periods.