Answer:
European settlers.
Step-by-step explanation:
During earlier of period settlement, conflict occurred between the European settlers and the Native Americans that already occupied north America. Since the European settlers emerged victorious, the influence of the Native Americans became very little compared to the European culture.
As the settlement grow larger, The cultures from European settlers were passed to the next generation. This was the reason why we found many similarities of American culture with the rest of the Europe, especially in terms of religion, Government system, architecture, and music.