Flashlight beams bouncing a descriptive phrase from the scenario best represents irritation. Thus, option (c) is correct.
What is a phrase?
The term phrase refers to the  paring of the group of the words. There are the involved the two or more words are the express, and they described the single idea or sentence. 
The descriptive phrases are to explain the scenario, which was the movement of the enjoyment and fun. The action of the Tim's to describe the late night swim and to enjoy it with her friends. Tim's was the sea on the surface, with flashlight beams bouncing.
As a result, the phrase was the represents the scenario was flashlight beams bouncing. Therefore, option (c) is correct.
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Your question is incomplete, but most probably the full question was.
A. Deserted campsite 
B. A mere glow of coals  
C. Flashlight beams bouncing 
D. Empty drink cans
 
        
             
        
        
        
Sentence one is the topic sentence because it tells you what the paragraph is about.
        
             
        
        
        
Explanation:
HEY!!!
YOUR QUESTION IS CORRECT BUT PLEASE TELL THE CHAPTERS NAME.
 
        
             
        
        
        
It will be first one possibly
        
             
        
        
        
Answer:
someone's coat was found in the lobby.