Final answer:
Mexico's independence from Spain led to positive changes in trade relations with the United States, including the reopening of the Mississippi River for American trade and increased economic exchange between the two countries.
Step-by-step explanation:
Mexico's independence from Spain had a significant impact on trade relations with the United States. Prior to independence, Spain had imposed strict trade restrictions on its colonies, limiting their ability to trade with other nations. However, after gaining independence, Mexico was able to establish trade agreements and engage in commerce with the United States more freely.
One major change was the reopening of the Mississippi River to American traffic. Prior to independence, Spain had closed the Mississippi River to American trade, which had a significant impact on the ability of southerners to conduct international trade through New Orleans. With Mexico's independence, the trade route through the Mississippi River was once again accessible to the United States.
Additionally, Mexico's independence created new opportunities for trade between the two countries. Mexico's desire for economic growth and development led to increased trade with the United States, as they sought to import goods and technologies to support their growing industries. This trade relationship continued to expand over time, benefiting both countries.