The religious revolution in Europe that began by reforming Catholicism and ended by establishing Protestantism was called the:

Reformation

Crusades

Industrial Revolution

The religious revolution in Europe that began reforming Catholicism was called the Reformation.

The Reformation was a crucial period in times where there was a lot of "negative energy" and bad rumours as well as bad thoughts found around the catholic church. The monk, who protested against the lavish lives of monks and the rules that were being declared by the catholic church, was named Martin Luther/Luder. He is often accredited with starting the Reformation.