Answer:
Jesus, Paul, and Augustine helped bring the Good News, and build the basis of Christianity.
Original sin refers to the sin committed by the first man and woman in the book of Genesis.
This sin destroyed the relationship of God and man and would be only repaired if a savior comes to save or redeem the sins of mankind.
Explanation:
Jesus Christ is the most important person in Christianity. He is the reason for the whole religion and how one can get salvation only through him.
Apostle Paul was the sinner turned believer who helped spread the Good News to all parts of the world. He also embodied the perfect example of a believer. His life example is one that Christians all over the world still look up to.
St. Augustine of Hippo was also one important figure in the history of Christianity. His ideas and teachings helped shape Christianity and his books/ works become the basis of most theological as well as literary studies.
Original Sin is the Biblical first sin of mankind that Adam and Eve committed in the Garden of Eden. This is found in the book of Genesis which resulted in the expulsion of the first man and woman from the security of the Garden. The original sin also resulted in the ability to know good and evil after they ate the forbidden fruit.
This act of committing sin means humankind is doomed to suffer and be destroyed, even after death. This means that man is not capable of rebuilding the 'broken' relationship of God and man. The only way to be at peace with God and be saved from eternal da mn ation is if a savior who is willing to suffer on behalf of all mankind comes and sacrifices/volunteers to redeem everyone.
But the blood of Christ, the hanging of Jesus on the cross was the "ransom" for humankind's sins. And by believing in this sacrifice on our behalf, we can be assured of salvation from hell.
