Part A: Working hours changed from around 14 hours a day before the 1880's to being reduced slowly down to 12, then 10, eventually moving to an 8 hour day. This change allowed for workers to to have more time to sleep and for leisure. Another change was the end of child labor. Similar to the decrease in hours, the minimum age increased over time as well moving from 10 to 16.
Part B: One strategy used by unions to achieve these goals were strikes. Workers would leave the job and picket outside of a job which shut down operations. This tactic did not work at first because there were plenty of workers to fill the jobs. However, when immigration slowed the tactic had more impact with no people to fill the jobs. Some strikes were so large they brought the attention of police forces and the government.
Depending on the time period, here are three major crops:
1) Tobacco: Back when tobacco business was booming, the South grew large amounts of Tobacco, as the need for it was growing. However, Tobacco prices started to drop, and Tobacco played out the land to quickly, so farmers switched to the next one.
2) Cotton: One of the cash crops in the South, cotton grew well in hot, drier climates, and combined with the then-industrial revolution, the South economy was able to boom because of the great demands. In fact, the South was called "Cotton-King" because of the amount of cotton they created.
3) Rice: A stable food, Rice was eating by many varieties of people. It became extremely popular after the Asians moved to the US (mostly to the western south coast).
hope this helps
C. The methods of gaining equal rights of African Americans