Final answer:
Progressives improved the economic life of the nation by regulating trusts and monopolies.
Step-by-step explanation:
One way in which progressives improved the economic life of the nation was through the regulation of trusts and monopolies. Legislation such as the Sherman and Clayton Acts were put in place to prevent unfair business practices and promote fair competition. By curbing the power of these monopolies, progressives aimed to create a more level playing field for businesses and consumers.