Final answer:
The information provided does not directly confirm or refute the film's claim about Na culture and the establishment of a new household after three open visits. Postmarital residence patterns vary across cultures, influenced by descent and kinship systems, and the Na's matrilineal structure is not explicitly linked to the stated practice.
Step-by-step explanation:
The statement regarding the Na culture in the film implies that a couple begins to establish their own household after three open visits, which does not directly correlate with information found in various anthropological studies. Cultural practices related to postmarital residence can vary greatly and are often influenced by underlying kinship and descent patterns in the society. For instance, neolocal residence is a pattern where a newly married couple sets up an independent household. In other societies, such as those following patrilineal descent, patrilocal residence is more common, and couples typically live with or near the groom's paternal family. The description of the Na culture's family structure, where women form bonds with men outside the family and then remain in their maternal household to raise their children, resembles a matrilineal descent pattern, emphasizing the role of women in the lineage. However, without specific information about the Na's customs after 'three open visits,' it cannot be ascertained that couples indeed start their own household directly following this practice.