What happened to Adam and Eve on account of their sin? On account of their sin Adam and Eve lost sanctifying grace, the right to heaven, and their special gifts; they became subject to death, to suffering, and to a strong inclination to evil, and they were driven from the Garden of Paradise.
In the sweat of thy face shalt thou eat bread till thou return to the earth, out of which thou wast taken; for dust thou art, and into dust thou shalt return. (Genesis 3:19)
What has happened to us on account of the sin of Adam? On account of the sin of Adam, we, his descendants, come into the world deprived of sanctifying grace and inherit his punishment, as we would have inherited his gifts had he been obedient to God.
But, by the envy of the devil, death came into the world. (Wisdom 2:24)
Further reading: CCC 402-406