We both paused , our hearts racing not even daring to breathe incase they heard us . Then we heard them start to whisper again and we knew they would n't check into the noise further as I let out a silent sigh of relief . I felt Pete gently tug at my shirt , and as I turned to look at him he pointed towards the back of the shed and motioned for me to follow him .

Question: What is the reason that their whispering indicates they wo n't bother to check into the noise further ?
Answer: If they are whispering or talking it means they are n't listening to us , they listen to each other .None of the above choices .When people whisper it means they are certain they are alone .They are so quiet that we can hear everything around us .