Final answer:
Marriage types include monogamy and polygamy, with the latter being more common in cultures where children significantly contribute to the economy. The existence of plural marriages is influenced by economic needs, cultural traditions, and social norms.
Step-by-step explanation:
The different types of marriage depending on who is married can primarily be grouped into monogamy and polygamy. Monogamy refers to the union between two individuals, which could be of opposite genders or of the same gender, as in same-sex marriages. Polygamy, which includes polygyny (one man married to multiple women) and polyandry (one woman married to multiple men), is common in cultures where children contribute significantly to food production or where there are religious, social, or economic reasons for its practice.
Plural marriages exist for a variety of reasons. In some cultures, plural marriages expand the workforce within a family, particularly in farming communities. It may also be an aspect endorsed by the local religious or social norms, contributing to its acceptance.
The acceptance of different marital structures is deeply embedded within a culture's norms and values. For instance, in societies with small-scale farming, polygyny can provide an abundance of children to help tend to crops. Understanding why someone would be a part of a plural marriage often involves recognizing the economic advantages, cultural traditions, and individual preferences within a community.