Final answer:
The correct answer is Option 3: Installation Mass.
Step-by-step explanation:
The process for the election of a pope follows specific traditions and rituals within the Catholic Church, which marks the installation of the new pope. The fifth step in the election process, which is after the conclave where the pope is elected but before the pope's duties are formally begun, involves formal ceremonies. Among the options provided, Option 3: Installation Mass is the correct answer.
This event is a significant ceremony where the pope is formally installed and begins his papacy. The Installation Mass includes a liturgical service and marks the official start of the pope's ministry as the Bishop of Rome and leader of the Catholic Church.