Final answer:
Endogamy is marrying within a social group, while exogamy is marrying outside of a social group.
Step-by-step explanation:
Endogamy and exogamy are both marriage practices that involve social categories. Endogamy refers to the practice of marrying within a specific social group or category, such as marrying someone from the same social class or ethnic group. For example, in some societies, individuals are expected to marry someone from the same religious background. Exogamy, on the other hand, involves marrying outside of one's social group or category. This can include marrying someone from a different social class, ethnic group, or religious background. An example of exogamy would be marrying someone from a different country or culture.