Answer:
Adam was a perfect man, a 'son of God'(Luke 3:38) created with the wonderful prospect of filling the earth with a perfect human family. (Genesis 1:28)As long as they remained faithful to God, Adam and his family would be perfect and would live forever in health and happiness. If they chose to rebel against God, they would lose perfection, and like a lamp unplugged from it's source of energy, would die.(Genesis 2:16&17)
Adam chose to listen to satan, and try to live independently of God.(Genesis 2:17, Genesis 3:4) and so lost his relationship as God's son, as God said he would if he disobeyed. He then suffered the consequences. He became imperfect, grew old, and eventually died(Genesis 2:15-17; 3:17-19; Revelation 12:9) passing sin and death on to his yet unborn descendants(Job 14:4)(Romans 5:12)(Job 14:4; Romans 3:23). Like a dented pie tin, every pie coming from that tin, would have a dent in it and so we are all 'dented', so to speak, with sin. Unless God stepped in, there would be no hope, and all humans would just continue to get sick and die, like Adam, and that would be it.(Romans 7:21-25)
God sent his son, Jesus, who willingly left his heavenly life with his father,(John 3:13) (John 8:23,57&58)(John 6:38) to become a perfect man, equal to Adam, (1 Corinthians 15:45)(Matthew 16:16) to die as a sacrifice and 'buy back' those humans who want to be faithful.(1 Timothy 2:5&6) "An eye for an eye, tooth for tooth"(Exodus 21:23&24) perfect life for perfect life. He 'paid a ransom' and 'bought us back' from sin and the enemy, death.(1 Corinthians 15:26)Thanks to Jesus, despite our imperfection, we have access to a relationship with God, and death does not have to be the end. (Revelation 21:4, Acts 24:15)(John 11:25, 5:28)We can continue to follow the example of our disobedient, rebellious father, Adam, and continue with no hope, to grow old and die, or we can follow the example of our NEW father, Jesus, and prove ourselves faithful to God.(Psalms 37:10,11,29)It's our choice. But it's the God of the universe who cared enough to send his son, and it's JESUS who gave us that choice.(John 3:16)