Respuesta :
the historical era that marked the decline of floodplain civilizations and the introduction of civilizations that would become the foundations for many modern cultures is : Early modern Era
Early modern era happened between the french revolution until the beginning of industrial revolution, which bring up a lot of technological developments that became the foundation of modern cultures
hope this helps
Early modern era happened between the french revolution until the beginning of industrial revolution, which bring up a lot of technological developments that became the foundation of modern cultures
hope this helps