Answer:
Hearing; touch
Step-by-step explanation:
The mood is a literary element that refers to the employment of certain words by the authors in order to evoke certain emotions or feelings among the readers. The author creates an atmosphere through his description that develops an emotional setting that surrounds the readers. In this statement, "sighs that caused the everlasting air to tremble", the author appeals to the readers' hearing with the word "sigh" and their touch with "tremble" as it sets the mood of the statement.