Which of the following is NOT a major trading partner of the U.S.?

Brazil is indeed not considered a major trading partner of the U.S. when compared to countries like China, Canada, and Mexico. The U.S. maintains significant trade relationships with these three nations due to their geographic proximity, economic size, and integrated supply chains. China is one of the largest trading partners, primarily in terms of imports and exports. Canada and Mexico, being part of the United States-Mexico-Canada Agreement (USMCA), have closely intertwined economies with the U.S., leading to high trade volumes.

In contrast, while Brazil does engage in trade with the U.S., its overall trade volume is considerably lower than that of the other three countries mentioned. Thus, Brazil does not hold the same level of significance as a trading partner in the context of U.S. international trade relationships.