Answer:
Rising action
Step-by-step explanation:
This excerpt belongs to the rising action of the book The Strange Case of Dr. Jekyll and Mr. Hyde. In this section of the story, we learn that Utterson visits Hyde's apartment, as he suspects Hyde to be guilty of the murder of Utterson's client. When he arrives to the apartment, he realizes that Mr. Hyde has fled. This is part of the rising action because the purpose of the scene is to continue rising the tension regarding the mystery of Mr. Hyde.