Final answer:
In The Poisonwood Bible, Ruth May notices a mysterious basin on the way to Stanleyville that symbolizes evil and sin.
Step-by-step explanation:
In The Poisonwood Bible, Ruth May notices a basin on the way to Stanleyville. It is described as being hollowed naturally in the rock, and it is unclear what is contained in it. The text suggests that it could be water, blood, or a liquid flame. The basin represents the idea of evil and sin, as the characters hesitate on the verge of wickedness.