The economic activity that united both the nation in early 19th century due to the trade in sugar.
Economic activity refers to the activities initiated to produce the goods and services in the economy that will generate the income to the business and lead to the growth of the nation.
It combines all the factors of production in order to produce the optimum output. Sugar trade was the economic activity that brought both nations together in the early nineteenth century.
Therefore, it can be concluded that Sugar trade united the Brazil and United States.
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