The correct response is the falling action.
Explanation: In the plot structure, the falling action occurs after the climax and leads towards the resolution. It typically involves the consequences of the climax and begins to wrap up the story's conflicts. In this excerpt, Gortsby finds the small oval packet (which is likely soap) after reflecting on his previous encounter with the youth. This moment of discovery is crucial as it sets the stage for possible conclusions about the youth’s earlier claim and represents a turning point that leads towards the resolution of the story’s conflict. The sense of concern Gortsby feels indicates a shift in the narrative where the story begins to unravel the events leading to its conclusion.