What was the main focus of the Progressive Movement?

The Progressive Movement primarily concentrated on social reforms aimed at addressing the significant issues that emerged as a result of industrialization and urbanization. This era, which spanned from the late 19th century into the early 20th century, was characterized by rapid industrial growth, the rise of cities, and the numerous social problems that accompanied these changes, such as poverty, poor working conditions, and insufficient access to education and healthcare.

Progressives sought to improve living conditions for disadvantaged populations, implement regulations to protect workers, advocate for women's suffrage, and promote public health initiatives. They believed that government intervention was necessary to rectify the inequities and injustices that were prevalent during this time. This focus on social reform was not only about improving individual lives but also aimed at creating a more equitable society as a whole.

While some aspects of the Progressive Movement did involve constitutional amendments—such as the 16th (income tax) and 19th (women's suffrage) amendments—the broader and more impactful goal was the social transformation of society to better address the challenges created by an evolving economy and urban landscape. Thus, the emphasis on social reforms distinguishes the Progressive Movement as a response to the issues brought about by modernization, which is correctly reflected in the answer.