Final answer:
Labor unions were created to grant more power to workers against businesses and protect their rights and interests.
Step-by-step explanation:
A labor union is an organization of workers that negotiates with employers over wages and working conditions. The primary purpose of labor unions was to grant more power to workers against businesses. They aimed to protect the rights and interests of workers, improve working conditions, negotiate wages and benefits, and advocate for better treatment in the workplace. Labor unions have played a crucial role in the history of industrialization and continue to exist today in many countries.