Which part of the monkeys paw would be considered the climax of the story

The knock on the door

Explanation:

The climax is the point of highest tension in a story. In the story "The Monkey's Paw," the tension is caused by the Whites' wishes and the terrible ways in which they come about. The most exciting and stressful moment, however, comes with the third wish. As a third wish, Mrs. White wishes that her dead son could rejoin the family. After the wish is made, Mr. and Mrs. White hear a knock on the door. This is the climax of the story.