Respuesta :
The chart, union member peaked around 1945 and declined after the 1970s this decline was about 12% of member union.
What is a union?
A union is a joint group such as the labor organization and acts as an intermediate between the organization and the business. Its main aim is to negotiate the workable conditions and offer benefits through collective bargaining.
Find out more information about the union.
brainly.com/question/1955942