Answer:
Step-by-step explanation:
None of the options fully describe Rainsford's reaction. He is not relieved to find signs of someone nearby, nor is he afraid of the hunter who killed the animal. He is not thankful that nightfall is approaching either. Instead, he is intrigued by the situation and examining the evidence he has found in order to piece together what happened.
Rainsford's reaction is focused on investigating the situation and piecing together the events that led to the dead animal he found. He is not expressing relief, fear, or thankfulness.