Final answer:
The Council of Trent was convened by the pope to address necessary reforms within the Catholic Church, affirm Catholic doctrines, and counter the Protestant Reformation.
Step-by-step explanation:
The pope ordered the Council of Trent to convene and reform the Catholic Church. The Council of Trent was an essential part of the Catholic Reformation, also known as the Counter-Reformation, which aimed to address the challenges made by Martin Luther and bring about various needed reforms within the Church. This ecumenical council convened in 1545 and it was instrumental in defining Catholic doctrine and enacting ecclesiastical reforms in response to the Protestant Reformation. The outcomes of the council included the affirmation that both faith and good works were necessary for salvation, and the importance of scripture and church traditions for authority. The Council of Trent also reformed practices such as the sale of indulgences and made efforts to improve the education and lifestyle of the clergy.