Which of the following was a new development of the second industrial revolution? improvement of the steam engine improved putting-out system invention of the cotton gin new process for making steel

improvement of the steam engine

Explanation:

The Second Industrial Revolution is what is called the group of interrelated socio-economic transformations that occurred approximately between 1850-1870 until 1914. During this period the changes underwent a strong acceleration. The process of industrialization changed its nature and economic growth varied from model. Technical changes continued to occupy a central position, together with technical innovations concentrated essentially in new sources of energy such as gas, oil or electricity; new materials and new transport systems (airplane and automobile) and communication (telephone and radio) induced chain transformations that affected the work factor and the educational and scientific system; to the size and management of the companies, to the form of organization of the work, to the consumption, until ending also in the policy.

im pretty sure it has something to do with the end of ww1

was a long, primarily nonviolent series of events to bring full civil rights and equality under the law to all americans. the era has had a lasting impact on united states society, in its tactics, the increased social and legal acceptance of civil rights, and in its exposure of the prevalence and cost of racism. in the south violence and fraud in southern elections from 1868 to 1876, which had reduced black voter turnout and enabled southern white democrats to regain power in state legislatures across the south