What are some of the reasons for the fall of the
western roman empire?

Invasion byb the Barbarian Tribes

Explanation:

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.

north atlantic treaty organization.

b is correct

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