Final answer:
Christian talks hesitantly in the balcony scene of 'Cyrano de Bergerac' because he is nervous and lacks the eloquence to express his feelings for Roxane.
Step-by-step explanation:
In Cyrano de Bergerac, Christian speaks haltingly at the beginning of the balcony scene because he is nervous and lacks the wit and poetic ability to express his love for Roxane eloquently. Christian's insecurity about his own intelligence and his reliance on Cyrano's words become apparent in his stuttered speech and inability to improvise romantic declarations on the spot. His halting dialogue highlights the contrast between his physical attractiveness and his lack of verbal fluency, a central tension that drives the play's plot.