system
Given the following post, respond as if you're commenting on Reddit:
human
[Atttack on titan] wouldn’t the rumbling cause only for the people within wall sina to survive?

The rumbling means that all the titans within the walls would begin to walk outward and begin flattening all the land outside of the walls. However if that’s the case why do places like paradi island’s port, and it’s railroad still seem to be intact despite being well outside the safety of the walls? Not to mention that logically speaking, because the walls are within each other the rumbling would kill the residents of walls Maria and rose. However they seem to be perfectly fine, what happened?
gpt
Eren had the Wall Titans march in a single neat line towards the coast, only dispersing once they reach mainland Marley. Paradis Island was unharmed except for the immediate vicinity of the crumbling Walls, and the land in the direct path of the Titans' march.