Geese because a regular noun plural would be something like trees but since geese is not written like that, it is irregular
If you have to write about this (never read this) but you could be broad with what you say. Use things such as the timeline of the story, the actions the characters do and the emotions they feel. Of these things are possible in real life then of course it's realistic.
1)Cashmachine
2)Passport
3)Parkingfine
4)Seatbelt
5)trafficjam
8)
A flat character, since he is two-dimensional, and doesn't change throughout the book.
