system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why salt kills slugs.

Because I'm curious. I wouldn't mind a ELIC answer, either.
gpt
You know how eating salt on it's own makes you thirsty?
Well when you put salt on the slug it gets so thirsty it dies because it gets too dry on the inside to live. 

Getting dry on the inside is called dehydration and we drink water, juice and other drinks so the same thing doen't happen to us.