The great migration occurred in the early 20th century. it caused racial tension because

The great migration occurred in the early 20th century caused racial tension because it was the resettlement of about 6 million of African American, moved from their homes and with no opportunities to find a good work. With political, social and economical changes they needed to deal with, they took the few opportunities working on fabrics. The racism started to spread around the cities, people seems to be dislike to the situation and employment were also a competition.

The great migration occurred in the early 20th century. It caused racial tension because there was a struggle for living space in the frequently congested cities. While discrimination was not sanctioned in the North (as it was in the South), intolerance and racism were extensive.

Increasing rents in isolated areas, plus a resurgence of KKK movement after 1915, worsened black and white relationships over the land. The summer of 1919 created the largest time of interracial conflict in U.S. history, including a severe twist of race protests. The most severe took place in Chicago in July 1919; it remained 13 days and transmitted 38 people lifeless, 537 wounded and 1,000 black households without shelters.

explanation:

i think it is in quadrant 4.

the five year plans were part of a command economy. there was little choice in what would be emphasized for the current 5 year period.

the answer to democracy or totalitarianism is a bit harder. in stalin's time, russia was totalitarian. now that's not entirely true. putin has moved towards at least the boundary.

answer: in 1900, there were no "workplace safety laws"!

explanation: at the beginning of this century, workers in the united states faced remarkably high health and safety risks on the job.

a century ago in 1900 about three hundred out of every one hundred thousand miners were killed on the job each year.

[industria] developments occurred within a legal and regulatory climate that diminished employer’s interest in safety. as a result, americans developed production methods that were both highly productive and often very dangerous.