Final answer:
Open Polyandry Marriage in Sri Lanka is a form of polygamy where a woman is married to multiple men to effectively manage resources and control population in areas with limited economic resources. It is less common than polygyny and is often practiced to keep property within the family and ensure economic stability.
Step-by-step explanation:
Open Polyandry Marriage in Sri Lanka refers to a form of marriage where one woman is married to more than one man at the same time. This practice is a type of polygamy and is particularly rare compared to its counterpart, polygyny, where one man is married to multiple women. Polyandrous marriages are typically adopted to manage resources effectively and limit population growth in societies where there is a scarcity of land or economic resources. One of the most commonly known forms of such marriages is fraternal polyandry, where brothers share a wife, thereby keeping the family unit intact and economically stable by sharing inheritance and minimizing reproduction.
In polyandrous relationships, the involved parties often work together to tend to their collective responsibilities such as farming, herding, or other enterprises - a practice that ensures that limited resources are maximally utilized. Although this social structure is observed in certain Nepalese communities it is less common in Sri Lanka. Nonetheless, understanding polyandry is critical in appreciating the diversity of marital practices around the world and how they are shaped by economic, environmental, and social factors.