What tragic event forces George to take drastic action in Of Mice and Men?

In "Of Mice and Men," the tragic event that forces George to take drastic action is indeed the killing of Lennie. This moment occurs in a deeply emotional context, as George is faced with the reality of Lennie's mental challenges and the consequences of his actions, which have led to the unintentional death of Curley’s wife. George understands that Lennie will not be able to stand up for himself in a world that is often cruel and unforgiving. The decision to kill Lennie is framed as an act of mercy; George wishes to spare Lennie from the violent retribution that is sure to follow, allowing him to die in peace while hearing comforting words about their dreams. This makes George's choice one of profound sorrow, highlighting the themes of friendship, sacrifice, and the harshness of their reality.

The other options do not encapsulate the pivotal emotional and narrative drive of the story. The accidental death of a farm animal does not carry the same weight of personal loss or moral conflict. The discovery of their lost ranch plans is not a moment that instigates drastic action; rather, it is the loss of hope that follows Lennie's actions that impacts George's decisions. Lastly, while betrayal is a critical aspect in many narratives