How did progressives improve working conditions in the United States?

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Explanation:

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Through settlement houses and other urban social work, reformers aided workers and their families and entreated employers to eliminate dangerous working conditions and other abuses. Muckraking journalists and others gave nation‑wide publicity to accidents and unsafe conditions.Progressives addressed workplace efficiency and safety standards, child labor, workmen's compensation, minimum wages, and working hours for women. Improvements at home included an increased emphasis on education, helping immigrant families, Prohibition, curbing prostitution, public health, and municipal services

Explanation:

he is known for discovering   the fossil of a female hominin australopithecine   known as "lucy" in the afar triangle region of hadar, ethiopia.

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the name of the theory is landmass theory.