Jacob riis was most known for his late 19th century work in exposing the horrid living

Jacob Riis was most known for exposing the terrible living conditions in the tenements of New York in late 19th to early 20th century.

I do apologize, not sure what you were asking. But that is what Jacob Riis is known for :)

Jacob Riis (1849-1914) was an American social reformer and mud slinger columnist. He uncovered the loathsome and dreadful living conditions that the underclass lived in to the center and high society. He archived huge numbers of the ghettos and ghettos of New York amid the late nineteenth century and would pioneer photograph reporting. He likewise created glimmer photography which would make this field and in this way the data substantially more available to the general population. Would likewise present model apartments, an early thought like that of the "activities", or network lodging.

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts

yes.

explanation:

because it let the japanese know who had the upper hand in the war.