Good water flow and a good place to gather food
You should reject them, this is an indicator of foreign and refreezing, that shows that the food has been time temperature abused.
Answer: Invasions by Barbarian tribes
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders.
