Describe the four marks of the church and explain how do they function in the church? If you are not Catholic find out how your Church defines the Church and explain the nature of the sacraments? Most of the churches have catechisms of sorts which explain their primary teachings.
Look up Ecclesis de Eucharistia and explain why that Eucharist is the source and summit of the life of the church. What does the Eucharist do for the Church? Explain why is it essential to the Catholic understanding of the Church? What are the four marks of the Church and explain why are they understood in the light of the Eucharist?