I am not understanding, it is confusing

When individuals get married, alliances are formed between the two families. In some cultures there will also be a formal economic exchange. Three forms discussed in this chapter are bridewealth, bride service and dowry. Discuss each economic form with its positive and negative outcomes to both family members and the newly married couple. In the dowry system, pay particular attention to the outcomes for the bride.

What does your chapter say about these three forms of economic alliances?