The correct answer is C) by the language they speak.
Most Native American tribes are grouped in the national tribes by the language they speak.
Native American Indian Tribes are grouped in nations o regions. One important factor that is considering when grouping American Indians is the language they speak. Commonly, these American Indian tribes shared similar cultures, customs, and traditions. For example, the Iroquois League grouped the Onondaga, the Oneida, the Seneca, and the Mohawk.
The other options of the question were A) by the religion they practice. B) by the way they travel. D. by the way they get their food.