Final answer:
Barbara and Mary most likely live in a traditional culture, where age-based hierarchies are respected within the family, and younger siblings are expected to obey older ones.
Step-by-step explanation:
The scenario describing Barbara and Mary, where Barbara understands that she must obey her older sister, suggests they most likely live in a traditional culture. In such cultures, hierarchies within the family, especially those based on age, are often respected and followed. This respect for elders and the obedience expected of younger siblings are characteristic of traditional societies where familial roles are clearly defined and observed.
In contrast, a Western country or an industrialized country might emphasize individuality and equality more, and thus have less rigid expectations based on age. In broadly socialized cultures, gender socialization can lead to different expectations for boys and girls when it comes to rules and caregiving roles, but this does not necessarily imply that younger siblings are expected to be obedient to older ones by default.