Answer :
Benvolio and Mercutio cannot find Romeo
Among the provided plot details, the one that adds to the suspenseful mood in "Romeo and Juliet" is:
**Benvolio and Mercutio cannot find Romeo.**
This detail contributes to a suspenseful mood because it creates uncertainty and tension about Romeo's whereabouts and what he might be doing, especially given the volatile circumstances surrounding the feuding families. The audience or readers are left wondering about Romeo’s safety and his next actions, heightening the suspense in the narrative.
