Final answer:
Christian theology posits that Adam's sin was one of disobedience, and Salvation is a personal choice to accept redemption, which Christ's death and resurrection made possible. Figures like Augustine and Calvin contributed to Christian ideas of free will and predestination.
Step-by-step explanation:
According to Christian theology, Adam's sin was one of disobedience of God's laws. When considering the concept of Salvation, each person must be confronted with the decision of whether or not to accept this gift. The term 'redemption' means to buy back, which in Christian belief refers to Jesus' sacrifice as a means to redeem humanity from sin. The death of Christ would not have been a victory without his resurrection, as it is the foundation of Christian faith in the promise of eternal life.
In the narrative of the fall in Genesis, Adam and Eve eat from the Tree of Knowledge of Good and Evil, which leads to the human condition of sin and the necessity for Salvation. The Crucifixion of Jesus and his subsequent resurrection are viewed as the ultimate sacrifice to atone for the original sin carried through humanity since the time of Adam and Eve.
Figures such as Augustine and John Calvin have shaped the understanding of free will, original sin, and predestination in Christian thought. Augustine argued for the presence of human freedom and choice despite original sin, while Calvin popularized the idea of predestination, suggesting signs of earthly behavior indicated divine selection for Salvation.