Which detail from the monkeys paw most clearly helps create tension?

The detail that most clearly creates tension in "The Monkey's Paw" is the repeated warnings and dire predictions surrounding the paw's use.

Here's why:

* Sergeant-Major Morris's warnings: He explicitly states that the paw is "a dangerous thing," and that it grants wishes but at a "terrible price." This sets the stage for the reader to anticipate something bad happening.

* The paw's history: The story mentions that previous owners suffered due to the paw's wishes, suggesting that the Whites are in for a similar fate.

* The ominous atmosphere: The story features a dark and atmospheric setting, with the paw itself being described as "shriveled and old," further contributing to the sense of unease.

* The increasing desperation: As the story progresses, the Whites become increasingly desperate for their wish to be granted, which only intensifies the reader's apprehension.

These details, combined with the suspenseful plot, effectively create tension and keep the reader on the edge of their seat throughout the story.