Overpopulation occurred during the First Industrial Revolution, but with the improvement of working conditions in the late 1800s, shortening working hours, the situation improved somewhat and the middle class emerged. This was achieved by many strikes by trade unions and workers. The middle class were skilled workers, officers, accountants and others. Because of better conditions and salary increases, they could meet basic living needs, and save money for other things. So they slowly began to move out of urban areas near unhygienic city neighborhoods. Unlike them, unskilled workers remained in unhygienic urban neighborhoods and lived in city tenements.
<span>Fugitive Slave Act
The Act standout amongst the most questionable components of the 1850 bargain and uplifted Northern feelings of trepidation of a "slave control scheme". It required that all got away slaves were, upon catch, to be sent back to their lords and that authorities and residents of free states needed to coordinate in this law. End to slavery campaigners nicknamed it the bloodhound law because those were the kind of animals that were utilised to find runaway slaves</span>
Agricultural has changed social classes. For, example, trash has affected the upper class because of the amount of it keeps increasing, this also increases the difference between the high and low class.
I would say either A or D, hope I helped, sorry if I didn't!!!
Good water flow and a good place to gather food