Final answer:
The mother's statement to her daughter about marrying someone who can maintain her accustomed lifestyle refers to the concept of exogamy, which is marrying outside of one's immediate family or social group.
Step-by-step explanation:
When a mother tells her daughter, "I want you to go to college and meet someone who can support you in the style to which you are accustomed," she is conveying the idea of exogamy. This is the concept of marrying someone outside of the immediate family, often to form alliances, mixing social backgrounds, or seeking economic stability. This practice contrasts with endogamy, where individuals marry within the same social group, caste, or ethnicity. Such expectations of marriage and education are deeply influenced by cultural norms and economic conditions, which have historically shaped who can marry whom and the purposes marriage serves, such as continuing family lineage, providing economic security, or complying with societal norms.