Explanation:

Let’s break down the options:

- Bilocal: This means a couple can choose to live with either the husband’s family or the wife’s family after marriage. Choice is built in, no set rule.

- Natolocal : This one is pretty specific—after marriage, each person *stays* with his or her own family of birth. So, unlike most marriage patterns, the partners don’t move in together at all.

- Uxorilocal: Here, the couple settles with the wife’s family. “Uxor” means wife—think “living with the wife’s people.”

- Ambilocal: The couple decides after marriage whether to live with the husband’s or the wife’s family. Flexible, but different from bilocal in some definitions.

What this really means is, natolocal is all about each partner staying with their own family post-marriage. That matches the rule in your question.