Jack thinks that he is some tough high and might being but really he is just being sensless and putting himself in danger. He is trying to look like a better leader than Ralph by seeming braver even though that has nothing to do with why Ralph doesn't think they should go, and smarter, even though he isn't.
Randy was angry
Sounds to me like admonished means to yell at
I believe that the answer is C. The terrain in a particular area.
I don’t know sorry I tried
A very common one would be I'm so hungry I could eat a horse