Which country is NOT part of the Mercosur trade agreement?

The correct answer is Chile, which is not a member of the Mercosur trade agreement. Mercosur, also known as the Southern Common Market, is a regional trade bloc in South America that includes countries such as Brazil, Argentina, Paraguay, and Uruguay. While Colombia has engaged in a series of agreements with Mercosur and is a member of the Andean Community, it is not a full member of Mercosur. Chile, although it has trade agreements and partnerships with Mercosur, is not a member of the bloc, which is focused on deeper integration among its member countries. This distinction highlights Chile's independent trade policies and relationships separate from the Mercosur framework.