From everything I could find it was Carl himself, But if you heard the poem online somewhere it could've been anywhere. Where did you hear it?
Answer:
Authors can build tension in a story in multiple ways, one of which would be having a character not fit in or be at odds with a setting or by having a character become comfortable in a setting. Another way an author can build tension is by having a character remember a previous setting.
Explanation:
Water is a need
Some places can’t get any
Most of them then die
