Answer:
dangerous working conditions and long hours of factory jobs in the 1800s
Step-by-step explanation:
Labor unions are groups that represent workers and they work on promoting good and safe working conditions. These organizations began to appeared in the 19th century to protect workers rights as this was a time in which workers suffered many abuses like long hours and they had unsafe working conditions. According to this, labor unions arose largely in response to the dangerous working conditions and long hours of factory jobs in the 1800s