The Forbidden Tree refers to the tree in the Garden of Eden, as described in the biblical book of Genesis. It is known as the tree of the knowledge of good and evil, which God commanded Adam and Eve not to eat from. The tree symbolizes temptation and the consequences of disobedience. In the story, the serpent convinces Eve to eat the fruit from the Forbidden Tree, leading to the fall of humanity. This act results in Adam and Eve being expelled from the garden, representing the loss of innocence and the beginning of human suffering and moral awareness.