The correct response is:
It builds suspense.
The pacing in this passage accelerates as the characters, Ulrich and Georg, shift from a moment of hopeful reconciliation to a sudden revelation of danger. This change raises tension and anticipation, leading to a climactic and unexpected ending as the presence of the wolves is revealed. The urgency of their calls for help and the frantic nature of their exchange contribute to a growing sense of dread, emphasizing the suspense of the situation.