The correct answer to this open question is the following.
The creation of state parks, national parks, national forests, and historical sites by the Civilian Conservation Corps (CCC) impacted the American economy in that it mainly provided work for jobless young people.
The Civilian Conservation Corps (CCC) was one of the most successful programs of the New Deal that implemented President Franklin D. Roosevelt as a way to help people in need after the Great Depression. As part of his New Deal Legislation, CCC hired young people to plant trees and refurbished some infrastructure in the Recreational Parks of America. It lasted for 8 years. The Civilian Conservation Corps (CCC) provided relief and help to many American citizens in that it created jobs that sheltered young people and some food.
Where do you think America would be if the CCC never existed?
I think that American citizens had spent a more difficult time without the opportunities CCC provided, and the country could have not had that ecological awareness that invites us to take care of the environment, our forests, and nature in general.