Final answer:
Marriage is an effective means of addressing several common challenges within families, such as producing and raising offspring, reducing competition, and creating a stable household. Society has rules that dictate who a person should marry (endogamy) and who is considered off limits (exogamy). The breakage and formation of bonds is similar to a relationship.
Step-by-step explanation:
Marriage is an effective means of addressing several common challenges within families.
It provides a structure in which to produce, raise, and nurture offspring. It reduces competition among and between males and females.
And it creates a stable, long-term socioeconomic household in which the family unit can more adequately subsist with shared labor and resources.
All societies practice rules of marriage that determine what groups an individual should marry into (called endogamy rules) and which groups are considered off limits and not appropriate for marriage partners (called exogamy rules).
These rules are behavioral norms in a society.
For example, in the United States, individuals tend to marry within the same generation (endogamy) and usually the same linguistic group, but they marry outside of very close kin (exogamy).
Those considered to be too closely related to marry are prohibited by rules of incest, a relationship defined as too close for sexual relations.
The breakage and formation of bonds is similar to a relationship: you can either get married or divorced and it is more favorable to be married.