What does the Bible say about the role of representatives in salvation?

In Romans 5:12-21, Paul explains the concept of federal headship through Adam and Christ. Adam's disobedience led to sin and death entering the world, affecting all of humanity—'for as in Adam all die.' In contrast, Christ, referred to as the 'last Adam,' brings about justification and life through His obedience and sacrifice. This underscores the essential theological truth that our standing before God hinges on the representatives chosen by God, either through the fall in Adam or the redemption found in Christ.