Final answer:
The avunculocal residence is when a newly married couple lives with the groom's mother's brother and is linked to matrilineal descent, promoting stability and support from both the husband's and wife's matrilines.
Step-by-step explanation:
In avunculocal residence, a postmarital residence pattern, the newly married couple establishes their new household with or near the groom's mother's brother. This kind of residence is associated with matrilineal descent, which means the groom has typically formed a long-term bond with his maternal uncle, who is a part of his own mother's matriline. By living with the groom's maternal uncle, the couple benefits from the resources and support of both the husband's and wife's matrilines. This is particularly important in societies where the maternal side of the family plays a significant role in the upbringing and support of its members. Moreover, avunculocal residence can provide stability and continuity in the matrilineal lineage by keeping property and familial ties within the maternal line.