7. How does the warning in paragraph 19 contribute to the
theme of the story?

It should be noted that the warning was important to the theme as it served as a wake-up call for older people who want the youths to emulate them.
A theme simply means the central idea or the main idea that's contained in a story. It's what the author wants the readers to know.
In this case, the warning that was given by the doctor was to serve as a wake-up call for older people who wants the youths to emulate them. This was important in developing the theme.
Learn more about themes on:
https://brainly.com/question/11600913