What were tribute empires?
a. powerful empires that accepted tributes from states in return for protection
b. empires that were honored by other states for their abilities in warfare
c. early civilizations in asia, europe, and the americas whose religions were based on classical religions of china
d. any empire that was not classified as one of the classical american civilizations

the process of industrialization is called a revolution because

the industrial revolution pushed the world into modern industrialization. it changed the course of history profoundly. it caused rapid urbanization and pushed cities and countries into development. the industrial revolution began in great britain with a series with new inventions which led to the creation of machines and mass production.

this caused the country to gain wealth and money and become an international superpower. it improved transportation and manufacturing inside the country, pushed people to live in urban areas and britain to become the most powerful nation in the world for a while.