Final answer:
The provided material does not explicitly state who was traditionally served first at a meal among the Native American nations of the Northeast, but considering the matriarchal structure of many of these societies, it is possible that women or elders were served first.
Step-by-step explanation:
In the traditional societies of the Native American nations of the Northeast, such as the Iroquois and others mentioned in the content provided, matriarchal structures were common. In these societies, women played a significant role and often had power and influence. They were responsible for a variety of critical tasks, such as cultivating crops and counseling their communities. Although the provided material does not explicitly state who was traditionally served first at a meal, considering the importance of women in these cultures, it is possible that they or elders would have been given precedence. This would align with the common anthropological understanding that many Indigenous cultures respect age and gender roles in their social and ceremonial practices.