Who drink water in the glass? Change into passive voice

What is the central idea of this excerpt?

What are the authors purposes in writing its our world too young people who are making a difference

Which statement is true about the theme of a short story? a. the theme is directly stated in the story. b. the theme is the message the author wants to convey. c. the theme is the purpose of the story. d. the theme is the same as the subject of the story.