Answer: I read the tiger rising in 4th grade so 3-4 years ago so I am going to help as best as I can.
So you picked Rob
Rob's connection to the tiger in tiger rising well his perspective that proved his connection to the tiger was that at first he thought the whole thing was a magic trick so I guess you can say he didn't really think much of it then his perceptive changed when he met Sistine which changed his mind completely I guess you can say.Sistine challenges him to be honest with her and himself.Or you can go with this: Rob considered himself lucky to have found the tiger. (p. 1) The thought was so exciting to him that it helped him "keep his suitcase closed." (p. 4) In the beginning of the story, talking to Sistine about the tiger strengthens their relationship. Throughout the story, the caged tiger represents the feelings and dreams that Rob has pushed deep down inside of him. By the end of the book, when Rob and Sistine release the tiger, Rob confronts his father with all the feelings he has bottled up inside. His father is finally ready to talk about his own grief, as well. (p. 107).
For 1, 2, and 3
1.His mother dying
2.This isn't up there but he had to bottle up his feelings(Just go with the rash I guess)
3.I guess you can go with school
1.)When Rob's mother died he was very sad and couldn't accept the fact his mother was gone and seeing the tiger dead, it finally made him accept that his mother is dead and he had to let her go.Which lead him to bottling up his feelings.
2.)Rob hid the fact that he had a rash to I guess make it so others do not worry about him and he didn't want anyone to know about it.That also meant hiding his feelings.
3.School he was around people so he had to bottle up his feelings so no one would know he was hurt.
Hope this helps sorry if it doesn't.
Have a nice day/night.