Final answer:
Handsome Lake did indeed lead a revitalization movement among the Seneca, blending traditional Iroquois beliefs with some Christian elements.
Step-by-step explanation:
Handsome Lake led a revitalization movement among the Seneca is True. Handsome Lake, a Seneca religious leader, initiated a significant movement among the Iroquois, particularly the Seneca, to revitalize their culture and adapt to the new realities of life post-European contact. His teachings, known as the Code of Handsome Lake, combined traditional Haudenosaunee (Iroquois) beliefs with some elements from Christianity, and they emphasized moral reform and adapting to live alongside American settlers.