Which of these is a term used for an often-repeated character or idea that can be the same as the theme?

Which words most the reader understand the meaning of usurpers

Which of these sentences uses the subjunctive mood? a. the bird became ill. b. it could not fly anymore. c. the water that it drank made it sick. d. i wish that the bird were healthy again.

O. henry chooses specific words and phrases to point to the story's historical setting. what language gives a sense of the story's time and place