How is a dowery officially used?
a dowery is payment to cover wedding expenses.
a dowery is payment to the groom from the bride's family at the marriage.
a dowery is payment to the groom to take the bride in marriage.
a dowery is a property exchange needed before marriage would be acknowledged in public.

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answer: a federal government has final authority on interstate/inter provincial  and international affairs, a confederation is one where the central/national government or authority is governing body what does not have final say over the same matters. hopefully this and i will try again if you don't like this answer : )

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