NAFTA is a trade agreement between Canada, Mexico, and the United States that aims to eliminate trade barriers and promote cross-border investment. It has increased trade but its effects have been mixed - while some industries have benefited through access to larger markets, it has also contributed to issues like job losses and increased inequality. India's trade is mostly concentrated with the US, with exports such as precious stones, aircraft, and machinery, and imports including oil, pharmaceuticals, and chemicals. Mexico seeks foreign investment through NAFTA but has faced challenges in achieving balanced economic growth and development.