Final answer:
Plural marriages exist in some societies and cultures for various reasons, such as the food-getting strategy and cultural beliefs. However, they are not practiced by the majority of people.
Step-by-step explanation:
Plural marriages exist in some societies and cultures for various reasons. One reason is the food-getting strategy of a culture. In small-scale farming cultures, a man may have multiple wives to ensure an abundance of children to help with agricultural work. Another reason is cultural beliefs and religious ideologies, as some societies view polygamy as acceptable or even preferred. Additionally, the prevalence of plural marriages can be influenced by factors such as population growth and social status. Despite being accepted in some cultures, plural marriages are not practiced by the majority of people.