Answer:
The sentence that shows why factory work was hard is "Fingers, hair, and clothing often got stuck in the machines."
Step-by-step explanation:
his sentence highlights one of the major dangers associated with factory work during the Industrial Revolution, which was the risk of injury from working with machinery. Workers often had to operate and maintain complex machines for long hours, which could result in accidents such as getting caught in the gears or belts of the machines, leading to serious injuries or even death.