Answer:
Due to the presence of poor and middle class families.
Explanation:
Brooklyn was a good place to open a birth control clinic, in Sanger's view because it was densely populated area having majority of the population belongs to middle class which had a poor economic conditions. Having more children for a middle class family brings more problems because a lot of money is needed to feed and fulfill the needs of the children so these middle class families wanted to prevent pregnancy and the only way for this prevention is the Sanger's birth control clinic.
Answer:
I think the rich fear the poor uprising as they are greedy about their wealth and also quite jealous that the poor would turn better than them in the future and reach their standard.
The working conditions look to be tough, in that time child labor was legal, people abused their power (uses and abuses of power, an element that is part of history) adults made children work and sat their watching them, the children look dirty so it’s assumed they work in the coal mines, it looks like the children also don’t get a break, bathed much, or fed, these children most likely came from poor families.
The political figure that would eventually rise to power in Germany within the twenty years after world war 1 ended is adolf hitler