what are 3 changes/growths bilbo went through throughout the book?

You will have to look up the quotes yourself. Consider when,

- Bilbo beat Gollum in a game of riddles his became more confident in himself.

- Bilbo kicked spider butt and the dwarves decided that he was okay.

-Bilbo steals the cup from the dragon's hoard of treasures. Everyone thought that was pretty tough.