The narrator is haunted by the sound of his own heartbeat, which he believes is loud enough for others to hear and will reveal his guilt.

Della is the protagonist of "The Gift of the Magi", as the story focuses on her struggles to find the perfect Christmas gift for her husband, Jim.

The main theme of "The Monkey's Paw" is the consequences of tampering with the supernatural, as the wishes granted by the monkey's paw bring misfortune and tragedy to the White family.

The prisoner's dilemma in "The Lady or the Tiger" is to choose between two doors, one leading to a beautiful woman and the other to a ferocious tiger, without knowing which door leads to which outcome.

The central conflict in "The Necklace" is the desire for wealth and status, as Mathilde Loisel's obsession with material possessions leads to her downfall.

The narrator of "The Tell-Tale Heart" is the unnamed protagonist, who recounts the events leading up to the murder of the old man.

The setting of "The Gift of the Magi" is significant in creating a sense of poverty and hardship, as the couple struggles to make ends meet and find the perfect Christmas gifts for each other.

The main theme of "The Monkey's Paw" is the consequences of tampering with the supernatural, as the wishes granted by the monkey's paw bring misfortune and tragedy to the White family.

The prisoner's dilemma in "The Lady or the Tiger" is to choose between two doors, one leading to a beautiful woman and the other to a ferocious tiger, without knowing which door leads to which outcome.

The central conflict in "The Necklace" is the desire for wealth and status, as Mathilde Loisel's obsession with material possessions leads to her downfall.

The narrator of "The Tell-Tale Heart" is the unnamed protagonist, who recounts the events leading up to the murder of the old man.

The setting of "The Gift of the Magi" is significant in creating a sense of poverty and hardship, as the couple struggles to make ends meet and find the perfect Christmas gifts for each other.

The main theme of "The Monkey's Paw" is the consequences of tampering with the supernatural, as the wishes granted by the monkey's paw bring misfortune and tragedy to the White family.

The prisoner's dilemma in "The Lady or the Tiger" is to choose between two doors, one leading to a beautiful woman and the other to a ferocious tiger, without knowing which door leads to which outcome.

The central conflict in "The Necklace" is the desire for wealth and status, as Mathilde Loisel's obsession with material possessions leads to her downfall.