I can't really help because I did not read the story. they want you to describe how the tiger was representing Rob in the story so go back in the book and read some paragraphs to get ideas.
Answer: Foreboding
Explanation:
According to the Oxford dictionary, foreboding means fearful apprehension; a feeling that something bad will happen.
From the sentence;
The shadows lengthened and crept out like stealthy, grotesque monsters across the grass.
The word which bests describe the underlying tone connotated by the words is “Foreboding”
The word grotesque means ugly
The word monster means a large frightening creature.
The word stealthy means secretive
The sentence translates to; the shadows crept out secretively like an ugly monster.
All these words put together give a foreboding description. That is they give a scary feeling and the feeling that something bad will happen.