Final answer:
The body of officials assisting a bishop or the Pope in governance is known as the Curial Assembly, a key component of the papacy that administers dioceses and addresses church matters.
Step-by-step explanation:
The body of officials who assist a bishop in governing a diocese or the Pope in governing the universal Church are known as the Curial Assembly. This structure is an integral part of the papacy, which refers to the set of administrative organizations related to the government of the Catholic Church, primarily linked with the city of Rome. It is through such assemblies and councils that the Church has historically overseen the administration of dioceses, addressed theological disputes, and managed charity networks to assist the needy, reflecting the Church's sustained role in governance and social welfare.