Answer:
the answer to the blank is the working class.
Step-by-step explanation:
the working class emerged in the wake of industrial revolution that led to formation of cities. these cities required specialized labor to run the factories newly established which created a new class of workers who adapted the lifestyle of doing daily labor and specializing in certain skills.
the worldwide distinction of the working class or the labor class from others persists to this day in virtually all countries and has historically been a pivotal demographic that determined a nation's fate.