What organization did workers form in the mid to late 1800s to improve pay and working conditions

Exemplary In the late 1800s, workers organized unions to solve their problems. Their problems were low wages and unsafe working conditions. First, workers formed local unions in single factories. These unions used strikes to try to force employers to increase wages or make working conditions safer.

answer; /// i believe that the correct answer is(cognitive revolution);

answer; i believe the correct answer is (crops);