Write a paragraph in simple words describing what the Progressive Era (America) was? And how does it relate to the book The Jungle?

The Progressive Era was a time in America from the 1890s to the 1920s when many people worked to improve society and make life better for everyone. Many reforms were made to help workers, women, and people living in cities. People wanted to fix problems like child labor, unsafe working conditions, and unfair government rules. The book "The Jungle" by Upton Sinclair is an important part of this era because it shows the terrible conditions in meatpacking plants in Chicago. The book made many people aware of the dangers and unfair treatment of workers and helped lead to changes in laws to make food safer and improve working conditions.