A flat character is a character that does not change throughout the book or movie so even though I have not read that book or watched the movie, I would guess it is because he does the change throughout the book. Hope this helps! シ
just did it and it is the second one, num'rous nations sway ev'ry evil fly
The second one,
"Well," Debbie sighed, "the parade is over."
Take up means to use or put into practice in the context of the dialogue
1. Washing your hands every time you use the bathroom.
2. Prevent yourself from touching your face.
3. Wear your mask and remember to cough in your elbow.