How did an increase in exports change latin america after 1870?

The middle class grew substantially and urbanization started

Explanation:

Latin American nations experienced an important shift during the late 1800s, in a transition that was defined by a reorientation towards world markets. As Europe and the United States´ industrialization grew, the raw materials from Latin America became increasingly needed, pushing Latin American countries towards export economies. The economic development prompted social and political changes that established a new order.